Jobs from ASSYSTEM

Job Description Your future team : You will be joining a dynamic and collaborative commissioning team on-site at our Client In Derby which is a Nuclear Licensed Site. This is an exciting opportunity for a contractor looking to contribute to a critical project and work within an embedded team . This role will be based in Derby and will initially be working a 2-shift pattern Monday to Friday. There

Job Description Derby - Hybrid / 3 - 4 days per week on site in Derby Contract or staff roles available Your future team : You’ll work as part of an embedded team on-site with our client in Derby, where you’ll be responsible for producing design and manufacturing documentation for both mechanical equipment and structural supports. Your Missions: Undertake design calculations in accordance with pre

Job Description Join us a Senior Stress Engineer Location: Derby Staff Position Your future team : Assystem are expanding our Stress capability and are looking for enthusiastic Senior Stress Engineers to join us. You will report into the Stress Technical Lead and will work in an embedded team based at our clients site in Derby. Your Missions Provide integrity substantiation using Finite Element me

Job Description Tooling Designer / Mechanical Designer Derby Permanent & Contract roles available Your future Team: Your will be joining an Embedded Team as a Tooling Design Engineer / Senior Mechanical Designer. You will be responsible for performing full lifecycle engineering activities across a range of engineering projects which will form part of the submarine’s new build and development progr

Job Description Join us a Manufacturing Engineer Location: Derby Contract or Staff Positions available Your Future Team: You will be joining an Embedded Manufacturing team based at our client site in Derby. The Manufacturing Engineer will be responsible for providing technical support to the production team, designing and developing production processes, and implementing process improvements to en

Job Description Area Engineering Manager Warrington Contract (Inside IR35) or Permanent To lead and direct a multi-disciplinary engineering team to: Deliver the Stage 3 Define phase onwards in line with agreed project schedule and cost Drive engineering teams to optimise the Stage 2 Appraise and select a single preferred solution, and produce a Stage 3 Preliminary Design ️ Complete preliminary des

Job Description Project Engineering Manager Location: Warrington Type: Staff / Contract ️ Role Overview Overseeing substantial Engineering Design resources (financial and/or people) and being accountable for the development and delivery of legally compliant, pragmatic, fit-for-purpose design solutions that meet functional and business requirements. ‍ The successful candidate will perform at Princi

Job Description This role is integral to ensuring the successful delivery of HSEQ objectives across multiple high-profile nuclear and infrastructure projects . As the HSEQ Engineer , you’ll be responsible for embedding robust health, safety, environmental, and quality standards into project execution—ensuring compliance and driving continuous improvement. ⚙️ Key Responsibilities Ensure project com

Job Description This role is integral to ensuring the successful delivery of HSEQ objectives across multiple high-profile nuclear and infrastructure projects . As the HSEQ Engineer , you’ll be responsible for embedding robust health, safety, environmental, and quality standards into project execution—ensuring compliance and driving continuous improvement. ⚙️ Key Responsibilities Ensure project com

Job Description Your Mission: Join Our Team as a Document Controller! Are you a proactive professional with a passion for organization and detail? We’re looking for a Document Controller to join our dynamic Client-based team on an exciting new major Programme ! In this pivotal role, you’ll collaborate with project management teams to ensure the smooth flow of documents and information across diver

Job Description Join the Fusion and Modular Nuclear Business Unit! Provide technical expertise across the lifecycle of Electrical Systems for the SMR nuclear power plant. This covers the delivery of the complete design of the Electrical systems, spanning system architecture, sub-system design and equipment specification and design / selection to realise the final verified design of the power stati

Job Description Join the Fusion and Modular Nuclear Business Unit! Join our team as an Engineering Manager for the Electrical, Control, and Instrumentation (EC&I) department, supporting the design and delivery of cutting-edge SMR nuclear power plants. In this role, you'll coordinate and lead projects across EC&I, overseeing a wide range of systems vital to nuclear safety. Working closely with mult

Job Description Join the Fusion and Modular Nuclear Business Unit! Join our team as an Engineering Manager for the Electrical, Control, and Instrumentation (EC&I) department, supporting the design and delivery of cutting-edge SMR nuclear power plants. In this role, you'll coordinate and lead projects across EC&I, overseeing a wide range of systems vital to nuclear safety. Working closely with mult

Job Description Join the Fusion and Modular Nuclear Business Unit! Provide technical expertise across the lifecycle of Electrical Systems for the SMR nuclear power plant. This covers the delivery of the complete design of the Electrical systems, spanning system architecture, sub-system design and equipment specification and design / selection to realise the final verified design of the power stati

Job Description Join the Fusion and Modular Nuclear Business Unit! Join our team as an Engineering Manager for the Electrical, Control, and Instrumentation (EC&I) department, supporting the design and delivery of cutting-edge SMR nuclear power plants. In this role, you'll coordinate and lead projects across EC&I, overseeing a wide range of systems vital to nuclear safety. Working closely with mult

Job Description Join the Fusion and Modular Nuclear Business Unit! Provide technical expertise across the lifecycle of Electrical Systems for the SMR nuclear power plant. This covers the delivery of the complete design of the Electrical systems, spanning system architecture, sub-system design and equipment specification and design / selection to realise the final verified design of the power stati

Job Description Join the Fusion and Modular Nuclear Business Unit! Drive the cutting-edge design and development of Electrical Systems for the revolutionary SMR nuclear power plant! From defining system architecture to selecting and specifying high-performance equipment, you’ll play a key role in delivering a fully verified, world-class power station. Collaborate with top engineering teams across

Job Description Join Our Team as a Process Engineer! Exciting Opportunity to work on the SMR Project Be a part of designing complex thermal and fluid systems for the innovative SMR project! Embrace innovation and contribute to a commercially groundbreaking new build. Key Responsibilities: Analyze & Calculate : Support cooling water island systems with cutting-edge analysis and calculation methods.

Job Description Join the Fusion and Modular Nuclear Business Unit! Provide technical expertise across the lifecycle of Electrical Systems for the SMR nuclear power plant. This covers the delivery of the complete design of the Electrical systems, spanning system architecture, sub-system design and equipment specification and design / selection to realise the final verified design of the power stati

Job Description Join the Fusion and Modular Nuclear Business Unit! Drive the cutting-edge design and development of Electrical Systems for the revolutionary SMR nuclear power plant! From defining system architecture to selecting and specifying high-performance equipment, you’ll play a key role in delivering a fully verified, world-class power station. Collaborate with top engineering teams across

Job Description Join the Fusion and Modular Nuclear Business Unit! Drive the cutting-edge design and development of Electrical Systems for the revolutionary SMR nuclear power plant! From defining system architecture to selecting and specifying high-performance equipment, you’ll play a key role in delivering a fully verified, world-class power station. Collaborate with top engineering teams across

Job Description Join the Fusion and Modular Nuclear Business Unit! Drive the cutting-edge design and development of Electrical Systems for the revolutionary SMR nuclear power plant! From defining system architecture to selecting and specifying high-performance equipment, you’ll play a key role in delivering a fully verified, world-class power station. Collaborate with top engineering teams across

Job Description This role involves managing service delivery processes, coordinating with the IT Team and the business, and ensuring high levels of customer satisfaction. The ideal candidate will have strong leadership skills, a customer-focused mindset, and experience in IT service management. Key Responsibilities: Own and mature service management processes (e.g., Incident, Problem, and Change M

Job Description This role involves implementing and managing security measures to protect against cyber threats, conducting regular security assessments, and responding to security incidents. Key Responsibilities: Act as escalation point for complex incidents and service requests Diagnose and resolve issues across endpoints, M365, networking, and business applications Build, configure, and support

Job Description ️ Support Requirements Capture : Manage and challenge requirements for existing waste containers and interface equipment. Support Engineering Activities : Assist as defined by the Engineering Manager. Mentorship : Provide guidance and assurance to Senior Engineers and Designers. Determine Engineering Requirements : Assist in defining product requirements. Tolerances Understanding :

Job Description Senior Principal EC&I Engineer Warrington Staff - Permanent ⚡ Senior Principal EC&I Engineer The Senior Principal EC&I Engineer is fully accountable for all electrical, control & instrumentation (EC&I) engineering within their area, ensuring work is safe ✅, compliant , and fit for purpose across the full lifecycle. They provide technical leadership ‍♂️ , set standards, oversee assu

Job Description Project Specific Requirements Report to CSA RE on a daily basis Provide leadership, guidance, and support to the JV CSA design and site engineering team Attend the Warrington office a minimum of 3 days per week and visit the Sellafield site regularly (ideally fortnightly) to confidently engage with the multi-discipline JV construction team and subcontractors Check and comment on CS

Job Description A CS&A Engineer is required to support the delivery of the CS&A elements of the project, in collaboration with other stakeholders and engineering disciplines. The role will involve the following, among others: To produce engineering design work packages (specification, drawings, verification or assessment of engineering) that satisfy the legal and functional requirements along with

Job Description Are you a Senior Systems Engineer with experience working with mechanical, electrical, and process systems in a highly regulated industry (Nuclear, Aerospace, Defence, etc.)? Assystem’s Decommissioning Strategic Business Unit is expanding and we are looking for skilled Systems Engineers for our Defence packages of work. Your missions: Requirement specification production / manageme

Job Description Project Specific Requirements Report to CSA RE on a daily basis Provide leadership, guidance, and support to the JV CSA design and site engineering team Attend the Warrington office a minimum of 3 days per week and visit the Sellafield site regularly (ideally fortnightly) to confidently engage with the multi-discipline JV construction team and subcontractors Check and comment on CS

Job Description Senior Piping Engineer Warrington Staff or Contract (Inside IR35) To produce engineering design work packages (specification, drawings, analysis, verification or assessment of engineering) that satisfy the legal and functional requirements along with the associated performance conditions to the agreed time, cost and quality. Experience working within an asset care delivery function

Job Description ️ Ventilation Senior Engineer Contract (INSIDE IR35) or Permanent The Ventilation Senior Engineer will be directed by the Principal Engineer ‍ and will be required to support the design through the end of Preliminary Design and then into Define . The Ventilation Senior Engineer is required to deliver the ventilation and building services work scope ️, including the production and c

Job Description This is a hybrid role, with candidates considered within commutable distance of Bristol or open to supported relocation. Your role will include: Lead technical and project meetings for assigned mechanical contracts Coordinate technical leads across contract delivery and engineering priorities Oversee contractor deliverables, design reviews and technical submissions Manage design ch

Job Description As our Fire Safety Engineer, you will be integral to our safety and fire protection engineering team. You will leverage advanced tools to identify risks and recommend robust fire protection strategies. This position requires a deep understanding of fire dynamics, risk assessment, and proactive fire prevention measures. Responsibilities: Analyze 3D models to identify combustible mat

Job Description As our Fire Safety Engineer, you will be integral to our safety and fire protection engineering team. You will leverage advanced tools to identify risks and recommend robust fire protection strategies. This position requires a deep understanding of fire dynamics, risk assessment, and proactive fire prevention measures. Responsibilities: Analyze 3D models to identify combustible mat

Job Description As our Fire Safety Engineer, you will be integral to our safety and fire protection engineering team. You will leverage advanced tools to identify risks and recommend robust fire protection strategies. This position requires a deep understanding of fire dynamics, risk assessment, and proactive fire prevention measures. Responsibilities: Analyze 3D models to identify combustible mat

Job Description ️ Support Requirements Capture : Manage and challenge requirements for existing waste containers and interface equipment. Support Engineering Activities : Assist as defined by the Engineering Manager. Mentorship : Provide guidance and assurance to Senior Engineers and Designers. Determine Engineering Requirements : Assist in defining product requirements. Tolerances Understanding :

Job Description As our Fire Safety Engineer, you will be integral to our safety and fire protection engineering team. You will leverage advanced tools to identify risks and recommend robust fire protection strategies. This position requires a deep understanding of fire dynamics, risk assessment, and proactive fire prevention measures. Responsibilities: Analyze 3D models to identify combustible mat

Job Description As our Fire Safety Engineer, you will be integral to our safety and fire protection engineering team. You will leverage advanced tools to identify risks and recommend robust fire protection strategies. This position requires a deep understanding of fire dynamics, risk assessment, and proactive fire prevention measures. Responsibilities: Analyze 3D models to identify combustible mat

Job Description Assystem Energy & Infrastructure are recruiting for a Senior Mechanical Engineer to work at our customers site in Warrington on a contract basis. The Senior Mechanical Engineer is responsible for the creation of component/assembly designs and associated through life justification that meet their requirements and product attributes, ie life, cost availability and safety margins. Rol

Job Description Join the Fusion and Modular Nuclear Business Unit! Help shape the future of the energy transition at one of the world’s leading nuclear engineering companies. Assystem is growing fast — and our stress and structural integrity capability is growing with it. We’re looking for a Senior/Principal Stress Engineer who is ready to take the next step into a technical and capability leaders

Job Description Join the Fusion and Modular Nuclear Business Unit! Help shape the future of the energy transition at one of the world’s leading nuclear engineering companies. Assystem is growing fast — and our stress and structural integrity capability is growing with it. We’re looking for a Senior/Principal Stress Engineer who is ready to take the next step into a technical and capability leaders

Job Description Join the Fusion and Modular Nuclear Business Unit! Help shape the future of the energy transition at one of the world’s leading nuclear engineering companies. Assystem is growing fast — and our stress and structural integrity capability is growing with it. We’re looking for a Senior/Principal Stress Engineer who is ready to take the next step into a technical and capability leaders

Job Description Join the Fusion and Modular Nuclear Business Unit! Help shape the future of the energy transition at one of the world’s leading nuclear engineering companies. Assystem is growing fast — and our stress and structural integrity capability is growing with it. We’re looking for a Senior/Principal Stress Engineer who is ready to take the next step into a technical and capability leaders

Job Description Join the Fusion and Modular Nuclear Business Unit! The Process engineer will support the design of complex thermal and fluid systems for the SMR project. This exciting new build project is embracing innovation to deliver a commercially . The role will provide analysis and calculation support across Turbine Island systems and will contribute to an internal centre of excellence for a

Job Description Join Assystem as a Principal EC&I Engineer! About the Role: Assystem Energy & Infrastructure Ltd is growing, and we’re seeking a dynamic Principal Electrical, Control & Instrumentation (EC&I) Engineer to lead our most exciting projects across Nuclear, Defence, New Build, and Infrastructure. You’ll provide top-notch technical leadership, working with high-profile clients like Sellaf

Job Description Location: Warrington Type: Permanent / Contract Role Responsibilities Lead and direct a multi-disciplinary engineering team to: Identify the feasibility of the approach Develop an outline requirement specification Identify the TRL levels and associated development plans to deliver a viable solution ️ Prepare a plan for the delivery of the appraise and select phase of the project. D

Job Description As a Nuclear Design Engineer, you’ll be responsible for designing components, assemblies, and systems that meet stringent requirements for safety, cost, availability, and longevity. From early concept through to in-service support, you’ll ensure every design is resilient, efficient, and built to perform under real-world conditions. You’ll work across nuclear plant systems and suppo

Job Description We are seeking a Senior Environmental Consultant to ensure compliance with environmental legislation, permits, licences and consents. You will also work to protect of the environment and work collaboratively across multiple teams to drive forward environmental performance. Key responsibilities include: Site Supervision and Compliance - Undertaking site inspections of work areas and

Job Description We are seeking a Senior Environmental Consultant to ensure compliance with environmental legislation, permits, licences and consents. You will also work to protect of the environment and work collaboratively across multiple teams to drive forward environmental performance. Key responsibilities include: Site Supervision and Compliance - Undertaking site inspections of work areas and

Job Description We are seeking a Senior Environmental Consultant to ensure compliance with environmental legislation, permits, licences and consents. You will also work to protect of the environment and work collaboratively across multiple teams to drive forward environmental performance. Key responsibilities include: Site Supervision and Compliance - Undertaking site inspections of work areas and

Job Description To lead and assure consents management activities across complex, multi-disciplinary infrastructure projects, ensuring compliance with DCO and statutory obligations, managing risk, and supporting programme-level governance. The role operates with a high degree of independence and provides leadership, assurance and technical oversight across consents and commitments delivery. This r

Job Description The Job Mission We are looking for a Senior Software Engineer to join the Digital Excellence Centre (DEC) UK. You will help design, build and support secure, maintainable software products and reusable components that improve performance, decision-making and delivery across the business and for our clients. This is a hands-on role in a small, senior team, with real scope to influen

Job Description As the Assystem’s Defence Infrastructure account continues to grow, we are looking to recruit a dynamic, self-motivated Project Planner to support project delivery. Working alongside the Defence Infrastructure Project Manager(s) and PMO function, the Project Planner is the local point for all aspects of planning across the Defence Infrastructure portfolio. This role will be based a

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Intelligent Customer Role: En

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Intelligent Customer Role: En

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Intelligent Customer Role: En

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Intelligent Customer Role: En

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Intelligent Customer Role: En

Job Description The Job Mission Working on a major Nuclear Power Plant project, the Solution Architect will support the delivery of complex digital and enterprise technology solutions across the project programme. The role will focus on designing, governing, and integrating technology solutions that support engineering, construction, operations, and corporate functions within a highly regulated nu

Job Description Are you a Senior Systems Engineer with experience working with mechanical, electrical, and process systems in a highly regulated industry (Nuclear, Aerospace, Defence, etc.)? Assystem’s Decommissioning Strategic Business Unit is expanding and we are looking for skilled Systems Engineers for our Defence packages of work. Your missions: Requirement specification production / manageme

Job Description Are you a Senior Systems Engineer with experience working with mechanical, electrical, and process systems in a highly regulated industry (Nuclear, Aerospace, Defence, etc.)? Assystem’s Decommissioning Strategic Business Unit is expanding and we are looking for skilled Systems Engineers for our Defence packages of work. Your missions: Requirement specification production / manageme

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Senior Mechanical Engineer, you will be responsible for various Turbine Island design development activities. The Mechanical Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Ensure supplier deliverables meet require

Job Description Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for a Electrical Engineer to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting-edge projects developing technical solutions making net-zero power generatio

Job Description Join Our Team as a Process Engineer! Exciting Opportunity to work on the SMR Project Be a part of designing complex thermal and fluid systems for the innovative SMR project! Embrace innovation and contribute to a commercially groundbreaking new build. Key Responsibilities: Analyze & Calculate : Support cooling water island systems with cutting-edge analysis and calculation methods.

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Senior Mechanical Engineer, you will be responsible for various Turbine Island design development activities. The Mechanical Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Ensure supplier deliverables meet require

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the CAD Manager, the mechanical CAD engineer is responsible for the delivery of component models and definitions, system P&IDs, integrated layouts, and assemblies for the Small Modular Reactor (SMR). The role will involve developing an understanding of the layout and components within the SMR, collaborating with engine

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Senior Mechanical Engineer, you will be responsible for various Turbine Island design development activities. The Mechanical Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Ensure supplier deliverables meet require

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the CAD Manager, the mechanical CAD engineer is responsible for the delivery of component models and definitions, system P&IDs, integrated layouts, and assemblies for the Small Modular Reactor (SMR). The role will involve developing an understanding of the layout and components within the SMR, collaborating with engine

Job Description Join Our Team as a Process Engineer! Exciting Opportunity to work on the SMR Project Be a part of designing complex thermal and fluid systems for the innovative SMR project! Embrace innovation and contribute to a commercially groundbreaking new build. Key Responsibilities: Analyze & Calculate : Support cooling water island systems with cutting-edge analysis and calculation methods.

Job Description Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for a Electrical Engineer to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting-edge projects developing technical solutions making net-zero power generatio

Job Description Join Our Team as a Process Engineer! Exciting Opportunity to work on the SMR Project Be a part of designing complex thermal and fluid systems for the innovative SMR project! Embrace innovation and contribute to a commercially groundbreaking new build. Key Responsibilities: Analyze & Calculate : Support cooling water island systems with cutting-edge analysis and calculation methods.

Job Description Your Mission: The Opportunity We are seeking an experienced and motivated Acceptance Manager to lead the planning, development, and execution of acceptance strategies for a major defence infrastructure programme. Working closely with commissioning teams and a wide range of project stakeholders, you will play a critical role in ensuring successful transition from concept design thro

Job Description Join the Fusion and Modular Nuclear Business Unit! You will join an expanding team to support the development and delivery of work packages for our nuclear, marine and O&G clients based around our Sunderland office. The role supports Hybrid working. Your mission: Leading project tasks : Manage and plan projects for a team of engineers while coordinating with project management faci

Job Description Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for Systems and Senior Systems Engineers to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting-edge projects developing Nuclear Fusion technologies making n

Job Description Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for Systems and Senior Systems Engineers to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting-edge projects developing Nuclear Fusion technologies making n

Job Description Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for Systems and Senior Systems Engineers to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting-edge projects developing Nuclear Fusion technologies making n

Job Description ️ Ventilation Engineer – Technical Specialist Support Provide expert engineering support and investigative expertise for Sellafield’s Ventilation Technical Specialist Group ️⚙️. Maintain high standards of safety, performance, reliability, and documentation across critical ventilation systems — while staying calm, decisive, and effective under pressure. Key Responsibilities Deliver

Job Description Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for Systems and Senior Systems Engineers to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting-edge projects developing Nuclear Fusion technologies making n

Job Description You will support the delivery of mechanical building services designs across critical ancillary nuclear facilities. The role spans design review, technical coordination and onsite engineering support during installation phases. ️Review mechanical building services execution designs against NNB technical specifications Support development of scopes for early-stage mechanical design

Job Description You will support delivery of Operational Service Centre and Skybridge building design activities. The role combines design coordination, technical management and onsite engineering support through installation phases. ️Manage delivery of remaining MEP execution design packages and readiness reviews Coordinate technical configuration management and supplier-driven design change proc

Job Description Join the Fusion and Modular Nuclear Business Unit! In this role, you'll lead technical projects by managing engineering interfaces, ensuring cohesive design integration, and refining architectural frameworks. You'll liaise with stakeholders, handle requirements, and support early-stage activities like optioneering and design concept development, collaborating closely with a dynamic

Job Description Join the Fusion and Modular Nuclear Business Unit! In this role, you'll lead technical projects by managing engineering interfaces, ensuring cohesive design integration, and refining architectural frameworks. You'll liaise with stakeholders, handle requirements, and support early-stage activities like optioneering and design concept development, collaborating closely with a dynamic

Job Description In this role, you will be working with our experienced Simulation and Assessment team to deliver projects such as Finite Element Analysis (FEA) assessments of components for nuclear components to design codes such as ASME III or RCC-M. This includes planning, delivery and reporting of the projects, and communicating with internal and external stakeholders such as the customer’s tec

Job Description Join the Fusion and Modular Nuclear Business Unit! In this role, you'll lead technical projects by managing engineering interfaces, ensuring cohesive design integration, and refining architectural frameworks. You'll liaise with stakeholders, handle requirements, and support early-stage activities like optioneering and design concept development, collaborating closely with a dynamic

Job Description Join the Fusion and Modular Nuclear Business Unit! In this role, you'll lead technical projects by managing engineering interfaces, ensuring cohesive design integration, and refining architectural frameworks. You'll liaise with stakeholders, handle requirements, and support early-stage activities like optioneering and design concept development, collaborating closely with a dynamic

Job Description In this role, you will be working with our experienced Simulation and Assessment team to deliver projects such as Finite Element Analysis (FEA) assessments of components for nuclear components to design codes such as ASME III or RCC-M. This includes planning, delivery and reporting of the projects, and communicating with internal and external stakeholders such as the customer’s tec

Job Description Join the Fusion and Modular Nuclear Business Unit! In this role, you'll lead technical projects by managing engineering interfaces, ensuring cohesive design integration, and refining architectural frameworks. You'll liaise with stakeholders, handle requirements, and support early-stage activities like optioneering and design concept development, collaborating closely with a dynamic

Job Description The Role: Reporting to the Turbine Island Lead, the Senior Mechanical Design Engineer will be responsible for developing fluid systems. The Senior Mechanical Design Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the system design. Key Responsibilities: Develop 2D CAD drawings, including process flow diagrams (PFD) and process and instr

Job Description Job Description Act as the primary interface between HVAC design teams and construction/installation teams. Develop and Review HVAC designs and confirm accuracy of detailed specifications and engineering outputs. Perform technical assessments to ensure compliance with relevant standards and project requirements. Review and validate contractor documentation, drawings, method stateme

Job Description Join the Fusion and Modular Nuclear Business Unit! You will join an expanding team to support the development and delivery of work packages for our nuclear, marine, and O&G clients based around our Sunderland office. The role supports Hybrid working. As a Mechanical Engineer your role will include: Leading project tasks : Manage and plan projects for a team of engineers while coord

Job Description The Role: Reporting to the Turbine Island Lead, the Senior Mechanical Design Engineer will be responsible for developing fluid systems. The Senior Mechanical Design Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the system design. Key Responsibilities: Develop 2D CAD drawings, including process flow diagrams (PFD) and process and instr

Job Description Manufacturing Engineer Location: Flexible - Derby, Sunderland, Bristol. Travel within the UK is required. Security Clearance Required: SC & Sole UK National Staff and Contract roles available You will be supporting our clients to deliver high quality customer-engineered products and systems that meet tough testing, manufacturing, and project standards. You’ll play a key part in und

Job Description Job Description Act as the primary interface between HVAC design teams and construction/installation teams. Develop and Review HVAC designs and confirm accuracy of detailed specifications and engineering outputs. Perform technical assessments to ensure compliance with relevant standards and project requirements. Review and validate contractor documentation, drawings, method stateme

Job Description Join the Fusion and Modular Nuclear Business Unit! You will join an expanding team to support the development and delivery of work packages for our nuclear, marine and O&G clients based around our Sunderland office. The role supports Hybrid working. Your mission: Leading project tasks : Manage and plan projects for a team of engineers while coordinating with project management faci

Job Description Join the Fusion and Modular Nuclear Business Unit! You will join an expanding team to support the development and delivery of work packages for our nuclear, marine, and O&G clients based around our Sunderland office. The role supports Hybrid working. As a Mechanical Engineer your role will include: Leading project tasks : Manage and plan projects for a team of engineers while coord

Job Description Job Description Act as the primary interface between HVAC design teams and construction/installation teams. Develop and Review HVAC designs and confirm accuracy of detailed specifications and engineering outputs. Perform technical assessments to ensure compliance with relevant standards and project requirements. Review and validate contractor documentation, drawings, method stateme

Job Description The Role: Reporting to the Turbine Island Lead, the Senior Mechanical Design Engineer will be responsible for developing fluid systems. The Senior Mechanical Design Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the system design. Key Responsibilities: Develop 2D CAD drawings, including process flow diagrams (PFD) and process and instr

Job Description Join the Fusion and Modular Nuclear Business Unit! You will join an expanding team to support the development and delivery of work packages for our nuclear, marine, and O&G clients based around our Sunderland office. The role supports Hybrid working. As a Mechanical Engineer your role will include: Leading project tasks : Manage and plan projects for a team of engineers while coord

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Balance of Plant Lead, the Senior Mechanical Engineer shall be responsible for developing a fluid system. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the system design. Your mission: ​​​​​​ Lead Fluid System Development: Manage a small team to d

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Balance of Plant Lead, the Senior Mechanical Engineer shall be responsible for developing a fluid system. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the system design. Your mission: ​​​​​​ Lead Fluid System Development: Manage a small team to d

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Balance of Plant Lead, the Senior Mechanical Engineer shall be responsible for developing a fluid system. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the system design. Your mission: ​​​​​​ Lead Fluid System Development: Manage a small team to d

Job Description Role Overview The Industrial Architect will be responsible for the architectural design, planning, and coordination of structures within a large-scale power station project. This includes integrating architectural solutions with complex engineering systems, ensuring compliance with safety, environmental, and regulatory requirements, and supporting efficient plant operations. Key Re

Job Description Area Engineering Manager Warrington Contract (Inside IR35) or Permanent To lead and direct a multi-disciplinary engineering team to: Deliver the Stage 3 Define phase onwards in line with agreed project schedule and cost Drive engineering teams to optimise the Stage 2 Appraise and select a single preferred solution, and produce a Stage 3 Preliminary Design ️ Complete preliminary des

Job Description CS&A Responsible Engineer Warrington Staff or Contract (Inside IR35) CS&A Responsible Engineer (RE) ️ The RE holds full technical accountability for Civils, Structural & Architectural (CS&A) engineering within their area, ensuring all work is safe, compliant, and fit for purpose across the project lifecycle . Working to R2A2 (ED21), you’ll provide technical leadership, governance,

Job Description Join us a Manufacturing Engineer Location: Derby Contract or Staff Positions available Your Future Team: You will be joining an Embedded Manufacturing team based at our client site in Derby. The Manufacturing Engineer will be responsible for providing technical support to the production team, designing and developing production processes, and implementing process improvements to en

Job Description Your future team : You will be joining a dynamic and collaborative commissioning team on-site at our Client In Derby which is a Nuclear Licensed Site. This is an exciting opportunity for a contractor looking to contribute to a critical project and work within an embedded team . This role will be based in Derby and will initially be working a 2-shift pattern Monday to Friday. There

Job Description Senior Mechanical Engineer - Nuclear Derby Permanent or contract As part of a growing account, Assystem Energy & Infrastructure are looking to increase the size of their Derby site team to respond to an increase in workload and are recruiting for a Senior Mechanical Engineer Key Responsibilities: Identify, formulate, and produce effective solutions to emerging problems ️ Evaluate f

Job Description Tooling Designer / Mechanical Designer Derby Permanent & Contract roles available Your future Team: Your will be joining an Embedded Team as a Tooling Design Engineer / Senior Mechanical Designer. You will be responsible for performing full lifecycle engineering activities across a range of engineering projects which will form part of the submarine’s new build and development progr

Job Description Derby - Hybrid / 3 - 4 days per week on site in Derby Contract or staff roles available Your future team : You’ll work as part of an embedded team on-site with our client in Derby, where you’ll be responsible for producing design and manufacturing documentation for both mechanical equipment and structural supports. Your Missions: Undertake design calculations in accordance with pre

Job Description Are you a skilled Principal or Senior Mechanical Engineer with a passion for delivering cutting-edge solutions in a highly regulated industry? We are looking for an experienced calculation and design checker to check detailed design calculations for mechanical and structural designs. If you thrive in a dynamic, problem-solving environment, this role is for you! Your missions: Manag

Job Description Project Specific Requirements Report to CSA RE on a daily basis Provide leadership, guidance, and support to the JV CSA design and site engineering team Attend the Warrington office a minimum of 3 days per week and visit the Sellafield site regularly (ideally fortnightly) to confidently engage with the multi-discipline JV construction team and subcontractors Check and comment on CS

Job Description Senior Piping Engineer Warrington Staff or Contract (Inside IR35) To produce engineering design work packages (specification, drawings, analysis, verification or assessment of engineering) that satisfy the legal and functional requirements along with the associated performance conditions to the agreed time, cost and quality. Experience working within an asset care delivery function

Job Description Senior Mechanical Designer Contract: 6 month, Umbrella contractor Location: Remote Your future team: Are you a talented Senior Mechanical Designer with a passion for delivering design to manufacture? We are experiencing significant growth in our Defence sector and need skilled professionals to join our dynamic team. This is an exciting opportunity to work on Assystem-led projects a

Job Description Mechanical Designer Contract: 6 month, Umbrella contractor Location: Remote Your future team: Are you a talented Mechanical Designer with a passion for delivering design to manufacture? We are experiencing significant growth in our Defence sector and need skilled professionals to join our dynamic team. This is an exciting opportunity to work on Assystem-led projects across our UK o

Job Description Senior EC&I Engineer - Warrington Full Time Join Our Team at Assystem! Your Future Team: Assystem is a well-established leader in the nuclear decommissioning sector. Partner of the Design Services Alliance. Expertise in waste management services for strategic nuclear clients in the UK. Offering life extension and feasibility assessment services. Your Missions: ⚡ To support the EC&I

Job Description Senior Principal EC&I Engineer Warrington Staff - Permanent ⚡ Senior Principal EC&I Engineer The Senior Principal EC&I Engineer is fully accountable for all electrical, control & instrumentation (EC&I) engineering within their area, ensuring work is safe ✅, compliant , and fit for purpose across the full lifecycle. They provide technical leadership ‍♂️ , set standards, oversee assu

Job Description Are you a Senior Systems Engineer with experience working with mechanical, electrical, and process systems in a highly regulated industry (Nuclear, Aerospace, Defence, etc.)? Assystem’s Defence & Decommissioning Strategic Business Unit is expanding and we are looking for skilled Systems Engineers for our Defence packages of work. Your missions: Requirement specification production

Job Description EC&I Responsible Engineer Warrington Staff or Contract (Inside IR35) ⚡ EC&I Responsible Engineer (RE) The RE is fully accountable for all electrical, control & instrumentation (EC&I) engineering within their area, ensuring work is safe ✅, compliant , and fit for purpose across the full lifecycle. They provide technical leadership ‍♂️ , set standards, oversee assurance, and retain r

Job Description We have an exciting opportunity for an individual to undertake Value Management for early project definition. The role involves helping teams of stakeholders to use VM to make the necessary decisions to define the problem, explore the possible solutions and identify the Single Preferred Solution. Value Management is subject to BS EN 12973 and is best practice to demonstrate good va

Job Description Your future team: Are you a talented Senior Mechanical Designer with a passion for excellence? We are experiencing significant growth in our Defence sector and need skilled professionals to join our dynamic team. This is an exciting opportunity to work on Assystem-led projects in any of our UK offices, with flexible hybrid working available. Your missions: Develop complete design c

Job Description As a Senior Process Engineer , you'll join Assystem’s renowned Nuclear Decommissioning Business Unit. You’ll work on a variety of tasks, from asset care replacement to the design of new facilities. This critical work will help maintain vital sample analysis capabilities across nuclear sites. ️ Leverage a wide range of skills: From technical process engineering deliverables to effec

Job Description Job Title: Project Manager Location: Derby Contract type: Umbrella company contractor As Head of Project, you will act as the single point of accountability for project outcomes—leading a partner-led delivery organisation while ensuring regulatory integrity, strategic alignment, and performance excellence. You will build and lead a high-performing, cross-functional client team , dr

Job Description Your Mission: The Civil Engineer will work as part of a multi-disciplinary engineering team within a Client's Approving Authority, primarily supporting operations and future programs at the client sites. The role involves working alongside Mechanical, Building Services, and Electrical Engineers to author, develop, assess, and maintain Engineering Design Substantiation. The goal is

Job Description As a Nuclear Design Engineer, you’ll be responsible for designing components, assemblies, and systems that meet stringent requirements for safety, cost, availability, and longevity. From early concept through to in-service support, you’ll ensure every design is resilient, efficient, and built to perform under real-world conditions. You’ll work across nuclear plant systems and suppo

Job Description We are expanding our radiological safety capability to support major programmes across Sellafield and the wider nuclear sector. You will act as a technical specialist leading radiological assessments, assuring safety case inputs and supporting critical decision making. Key Responsibilities Provide technical leadership in the development of Radiological Safety Assessments to ensure

Job Description As a Principal Safety & Risk Consultant within Assystem’s Safety & Risk business, you will lead the development and assurance of nuclear safety across complex defence infrastructure programmes. Acting as a technical authority and Intelligent Customer, you will provide oversight, challenge and direction to ensure safety cases are robust, proportionate and aligned with regulatory exp

Job Description As a Principal EC&I Engineer , you’ll play a key role in delivering some of our most exciting and complex projects. You’ll provide technical leadership across Electrical, Control & Instrumentation (EC&I) disciplines, supporting a diverse portfolio of high-impact programmes. Key Responsibilities Technical Leadership Lead EC&I engineering delivery for complex systems and projects ️ A

Job Description Location: Warrington Type: Permanent / Contract Role Responsibilities Lead and direct a multi-disciplinary engineering team to: Identify the feasibility of the approach Develop an outline requirement specification Identify the TRL levels and associated development plans to deliver a viable solution ️ Prepare a plan for the delivery of the appraise and select phase of the project. D

Job Description Join Assystem as a Principal EC&I Engineer! About the Role: Assystem Energy & Infrastructure Ltd is growing, and we’re seeking a dynamic Principal Electrical, Control & Instrumentation (EC&I) Engineer to lead our most exciting projects across Nuclear, Defence, New Build, and Infrastructure. You’ll provide top-notch technical leadership, working with high-profile clients like Sellaf

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Serve as the key liaison betw

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Serve as the key liaison betw

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Serve as the key liaison betw

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission: Serve as the key liaison betw

Job Description Join the Fusion and Modular Nuclear Business Unit! Your Mission: Build and maintain key stakeholder relationships to drive engagement with Assystem Manage framework agreements, ensuring compliance, quality delivery, and alignment with client expectations Promote Assystem capabilities and advise clients on suitable solutions Support bid activities and positioning for future framewor

Job Description Join the Fusion and Modular Nuclear Business Unit! Your Mission: Build and maintain key stakeholder relationships to drive engagement with Assystem Manage framework agreements, ensuring compliance, quality delivery, and alignment with client expectations Promote Assystem capabilities and advise clients on suitable solutions Support bid activities and positioning for future framewor

Job Description Join the Fusion and Modular Nuclear Business Unit! Your Mission: Build and maintain key stakeholder relationships to drive engagement with Assystem Manage framework agreements, ensuring compliance, quality delivery, and alignment with client expectations Promote Assystem capabilities and advise clients on suitable solutions Support bid activities and positioning for future framewor

Job Description Job Title: Project Manager Location: Derby Contract type: Umbrella company contractor As Head of Project, you will act as the single point of accountability for project outcomes—leading a partner-led delivery organisation while ensuring regulatory integrity, strategic alignment, and performance excellence. You will build and lead a high-performing, cross-functional client team , dr

Job Description Join Assystem as a Principal EC&I Engineer/ Protection Engineer! What You’ll Do: ️ Lead & Deliver: Guide EC&I engineering teams in delivering innovative solutions for complex projects. Creation and updating: The working ETAP model for the project ️ Production of: fault calculations Protection of: reports and arc flash risk assessments Power and protection specialism: Support to the

Job Description Senior EC&I Engineer - Warrington Full Time Join Our Team at Assystem! Your Future Team: Assystem is a well-established leader in the nuclear decommissioning sector. Partner of the Design Services Alliance. Expertise in waste management services for strategic nuclear clients in the UK. Offering life extension and feasibility assessment services. Your Missions: ⚡ To support the EC&I

Job Description Assytem is recruiting two experienced Technical Quality Document Management (TQDM) Specialists to support a high-profile client operating within a highly regulated engineering environment. This opportunity is ideal for professionals with 5 years’ experience in document control, information management, or a related technical governance role, looking to step into a more advanced, tec

Job Description Assystem’s Safety & Risk business supports some of the UK’s most complex infrastructure programmes across nuclear, defence and critical national infrastructure. We provide independent technical authority combining engineering insight, regulatory understanding and delivery pragmatism to ensure safety is demonstrably achieved and maintained across the full lifecycle. We are expanding

Job Description Mechanical Engineer – Heat Exchanger Design & Manufacture Contract Duration: 12 months. Location: Warrington / Hybrid 3 days minimum office working Start Date: ASAP Overview We are seeking an experienced Engineer with a strong background in design and manufacture with pressure vessel design codes. The successful candidate will support design close out and manufacturing documentatio

Job Description Your Mission as a Project Lead Engineer Are you ready to take on a challenging role in the Client Engineering team, supporting key technical assurance activities? We are looking for a Project Lead Engineer to oversee the design and implementation of mechanical Client work packages. Your work will involve the replacement and refurbishment of plant and equipment to meet modern standa

Job Description This role will involve developing and delivering CE&I design solutions in response to problem definitions and Project Functional Specifications from the client. Working within the current CE&I design team to deliver CE&I design against the schedule and support meeting key delivery milestones. ️Support plant configuration walk downs to confirm and accurately record task baseline det

Job Description Join our Team: We are looking for a Senior Project Manager to fill a vital role in support of a key Defence Nuclear Sector Client, able to commit to this long term infrastructure project management role. About the Role The Marine Senior Project Manager is a key role and will be responsible for leading delivery of the marine works design & build packages under the NEC4 form of contr

Job Description Your future team: Are you a skilled Mechanical Engineer with a passion for leading teams and delivering cutting-edge solutions in a highly regulated industry? We are looking for an experienced professional to take ownership of mechanical and structural design, provide technical leadership, and drive projects to successful completion. If you thrive in a dynamic, problem-solving envi

Job Description Your future team: Are you a skilled Mechanical Engineer with a passion for leading teams and delivering cutting-edge solutions in a highly regulated industry? We are looking for an experienced professional to take ownership of mechanical and structural design, provide technical leadership, and drive projects to successful completion. If you thrive in a dynamic, problem-solving envi

Job Description Project Specific Requirements Report to CSA RE on a daily basis Provide leadership, guidance, and support to the JV CSA design and site engineering team Attend the Warrington office a minimum of 3 days per week and visit the Sellafield site regularly (ideally fortnightly) to confidently engage with the multi-discipline JV construction team and subcontractors Check and comment on CS

Job Description ‍♂️ Senior Engineer Warrington Contract / Staff A CS&A Engineer is required to support the delivery of the CS&A elements of the project, in collaboration with other stakeholders and engineering disciplines. The role will involve the following, among others: General all-round civil and structural design experience required , with experience working on new nuclear build and interface