Assystem GmbH

Our Vacancy# Acceptance, Commissioning & Readiness Lead Defence Permanent / Glasgow United Kingdom 26/02/26 On site Share1. The UK's nuclear sector has entered a renaissance, with Nuclear Energy now a vital component as the country moves towards a target of Net Zero. Assystem provides critical support to this mission, accelerating the decommissioning and remediation of our legacy assets with a view to enabling a swifter energy transition, in parallel overcoming some of the largest engineering and environmental challenges of our generation. As a Global top 3 independent nuclear engineering organisation, Assystem is active across the full decommissioning lifecycle. In the UK, we work across the Civil and Defence nuclear estates, pioneering agile and fit-for purpose, customer-focused solutions, drawing on our established pedigree for delivery engineering excellence. Assystem have a proud heritage gained over decades both in the UK and overseas, (delivering, supporting, managing) some of the most complex engineering projects in decommissioning, repurposing legacy assets and key new build projects such as Hinkley Point C. Job Description About the role The ACR Lead will manage two teams within their remit; Acceptance & Commissioning Integration team, Readiness team.This requires an individual who is strategically focused, able to deliver against complex & changing demands, and has a background delivering in MOD and regulated environments. Experience of stakeholder management across MOD TLBs and commercial frameworks, risk & schedule management, and governance development & adherence are key requirements. Ex-MOD Civil Servant or ex-Military would be particularly suited to this role.The role will be split between attendance at client site and office (Glasgow), in addition to home working, aligning location with the need to integrate with the relevant stakeholders both in the programme and at client site. Occasional travel may be required to other locations such as Abbey Wood or supply chain partners to address specific programme demands. Acceptance, Commissioning & Readiness Lead Acceptance, Commissioning, and Readiness activities, working closely with client stakeholders and SMEs. Acceptance Define and agree clear acceptance criteria with stakeholders Lead FAT, SAT & UAT activities Oversee testing, manage issues, and secure formal sign-off Ensure compliance with client standards Commissioning Lead commissioning of new systems, equipment & infrastructure Coordinate across all partners Verify performance, inspections & operational readiness Deliver systems ready for service - on time and to standard Readiness Assurance Develop plans to achieve IOC & FOC Assure delivery and interoperability requirements Identify and mitigate operational risks Ensure training, support, documentation & assets are in place Stakeholder Engagement Act as the primary POC for acceptance & readiness Engage programme teams, supply chain & end-users Provide clear progress, risk & issue reporting Compliance & Handover Ensure adherence to site policy & governance Secure certifications, approvals & assurance evidence Manage seamless transition into operational service Essential Skills & Experience Proven experience leading acceptance, commissioning & readiness activities within complex, defence-regulated environments Strong understanding of MOD capability integration , including Joint Service Publications (JSPs), Defence Standards Excellent stakeholder engagement skills - able to build trusted relationships across diverse teams and organisations Experience producing reports and briefs to MOD standards (including JSP101) Strong project management capability - planning, scheduling, risk management & performance reporting Experience managing compliance with safety, quality & regulatory requirements Desirable Skills & Experience Knowledge of defence acquisition processes, including the CADMID lifecycle Familiarity with operational readiness planning and training delivery in a defence environment Recognised project management qualification (e.g. PRINCE2, APM or equivalent) Former MOD Civil Servant or UK Armed Forces experienceAdditional Information The Group is currently ranked Third in the world for nuclear engineering.A dynamic career management policy to enable our employees to progress through our five business lines: operations, project, technical, sales and support functionsProvide opportunities to work on exciting, global projectsAccess to an employee assistance programme with free mindfulness, health, wellbeing resources and a confidential support line available 24/7 via phone or textDiscount vouchers for days out and restaurants, eye test and glasses vouchers, cycle to work scheme, free flu jabs Security clearance: Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level.We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.Staff roleWe are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

A leading nuclear engineering organization in Glasgow is seeking an Acceptance, Commissioning & Readiness Lead to manage teams and ensure compliance in complex defence-regulated environments. The ideal candidate should have proven experience in stakeholder engagement and project management while complying with MOD standards. The role involves both site and home office work, with the need for occasional travel. The company offers opportunities for career progression and a supportive work environment.

A global engineering firm is seeking a Project Manager in Helensburgh, UK, to oversee the successful delivery of capital infrastructure projects. Responsibilities include managing all phases from preparation to commissioning, ensuring compliance, controlling costs, and leading team members. The ideal candidate will have extensive experience in construction, strong commercial skills, and proficiency in NEC4 contracts. This position offers opportunities for career growth and various employee benefits.

A leading engineering firm in the United Kingdom is seeking a Senior Planner to develop integrated project schedules for complex defence programmes. The ideal candidate will have significant experience in project planning, particularly in regulated environments, and strong proficiency in Primavera P6. Responsibilities include schedule analysis, risk management, and stakeholder collaboration. The role offers benefits such as a pension scheme, generous annual leave, and flexible working options.

A leading engineering company is seeking a Senior Planner for a hybrid role based in Glasgow. You will be responsible for managing project schedules and coordinating with stakeholders to ensure timely execution. Ideal candidates will have experience with NEC4 contracts and a background in nuclear or defence industries. This position offers opportunities to work on global projects and promotes diversity. Applicants must meet residency criteria for UK security clearance.

Our Vacancy# Senior Planner Defence Permanent / Project Management London United Kingdom 19/01/26 On site 50,000 - 60,000 £/yr Share Job DescriptionThe Senior Planner is responsible for developing, maintaining, and assuring fully integrated project schedules for complex defence programmes. The role supports effective decision-making by providing accurate planning data, schedule analysis, and risk-informed forecasts aligned with defence governance and assurance requirements.Working closely with Project Managers, Engineering, Commercial, and Risk teams, the Senior Planner ensures that programme schedules reflect scope, cost, risk, and resource constraints, and comply with contractual and regulatory standards.Key ResponsibilitiesPlanning & Scheduling Develop and maintain integrated, resource- and cost-loaded schedules across the full project lifecycle (design, manufacture, test, acceptance, and in-service support). Establish planning structures aligned to WBS, CBS, and contract deliverables. Ensure schedules comply with defence and organisational planning standards and best practice.Programme Control & Reporting Provide schedule performance analysis including critical path, float, dependencies, and milestones. Support Earned Value Management (EVM) and schedule health assessments. Produce clear, accurate planning reports for internal governance, senior stakeholders, and external customers.Risk & Change Management Integrate risk, opportunity, and mitigation actions into project schedules. Support schedule risk analysis (e.g. Monte Carlo) where required. Assess schedule impacts of change requests and support change control processes.Stakeholder Collaboration Work closely with Project Managers to support delivery planning and decision-making. Liaise with engineering, supply chain, commercial, and delivery teams to ensure schedule realism. Provide planning input to bids, proposals, and contract negotiations as required.Assurance & Continuous Improvement Support internal and external assurance reviews, audits, and readiness assessments. Mentor junior planners and promote planning best practice. Contribute to the continuous improvement of planning processes, tools, and standards.Skills & ExperienceEssential Significant experience in project planning within defence, aerospace, engineering, or complex regulated environments. Strong proficiency in planning tools such as Primavera P6 (essential) British National Experience producing and maintaining integrated master schedules. Solid understanding of critical path analysis, schedule logic, and performance measurement. Ability to communicate complex planning information clearly to non-planning stakeholders.Desirable Experience working with MOD or equivalent defence customers. Knowledge of Earned Value Management (EVM). Experience supporting bids or major programme re-baselining. Familiarity with risk and schedule risk analysis techniques. Professional accreditation (e.g. APM, PMI) or working towards it.Behaviours & Attributes Analytical and detail-oriented with a proactive mindset. Confident working in complex, high-assurance environments. Strong stakeholder management and influencing skills. Able to work independently while supporting wider programme objectives. Committed to integrity, confidentiality, and compliance. Benefits include: Pension scheme (8% company contribution / 4% personal contribution) 25 days' paid annual leave + bank holidays + option to buy or sell days Professional fees reimbursed Flexible working Employee referral schemeWe are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

Our Vacancy# Package Manager Mechanical & Piping Engineering Nuclear Permanent / Culham United Kingdom 23/02/26 On site ShareAssystem is an international company with one mission: accelerate the energy transition around the world. Every day, our 8,000 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy. We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition. Drawing on more than 55 years' experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked second in the world for nuclear engineering. To ensure a viable, efficient, and reliable energy future for all. Job DescriptionAble to review and critique the JDR programme decommissioning strategy using extensive industry knowledge, experience, and lessons learned from previous decommissioning programmes. Provide guidance and advice on the JDR decommissioning strategy, including the phasing and priorities afforded to projects within the decommissioning programme. Evaluate and advise on critical decisions that secure the benefits the decommissioning programme is tasked to deliver. Reach back to other team members in the parent organisation to seek lessons learned and advice as required. Accountable for ensuring appropriate technical processes and operating procedures are developed, followed, and formally implemented by the business. Develop detailed plans for the decommissioning of mechanical and piping systems, ensuring minimal disruption to surrounding works and operations. Conduct site assessments to identify mechanical and piping assets requiring removal or isolation. Coordinate with stakeholders to establish decommissioning schedules, working with waste, logistics, and other site interfaces. Perform risk assessments and implement mitigation measures to prevent associated hazards. Oversee fluid drainage, flushing, and isolation activities. Provide expert advice to resolve obstacles to delivery of mechanical and piping decommissioning packages by identifying and employing creative solutions, appropriate techniques, and proven procedures based on previous project experience. Manage, supervise, or assist with the disconnection, removal, and disposal of mechanical and piping equipment. Work closely with contractors, demolition teams, and facility managers to ensure seamless execution of scheduled work. Document system status before and after decommissioning, including mechanical and piping drawings and reports. Conduct final inspections to confirm the safe decommissioning of mechanical and piping systems. Confirm pressure systems are left in a safe condition. Update the isolations register and communicate updates with site personnel. Ensure proper handling, recycling, or disposal of mechanical and piping materials and hazardous waste. Identify opportunities for reusing or repurposing mechanical and piping components. Engage with programme stakeholders and suppliers to build and maintain positive relationships, establish and document requirements, define interfaces, manage expectations, and engage effectively with staff. Defer to the Decommissioning Lead Engineer and/or Engineering Integration Manager to resolve issues of the highest level of impact. Perform analysis and produce technical reports, presentations, and papers focused on communicating strategy, plans, options, progress, and risks within the programme team or to stakeholders. Deliver technical training in one-to-one sessions and proactively transfer knowledge to develop others through coaching, mentoring, or other appropriate approaches. Supervise other staff in routine and specialised activities, as applicable. Provide advice and guidance to other project teams as required. Essential: Recognised degree in Mechanical Engineering or a related field. Chartered Engineer with a recognised institution for mechanical engineering. Extensive experience in the application of appropriate design codes and regulations. Knowledge of building mechanical and piping systems. Familiar with pressure systems and piping design codes, typically ASME B31.1 and BS EN 13480. Experience of the Health and Safety at Work etc Act 1974. Proven engineering leadership experience, with a track record of delivering engineered solutions to complex programmes and projects. Extensive experience working in a decommissioning, demolition, or facility decommissioning environment. Strong problem-solving and analytical skills. Excellent communication and coordination abilities. Desirable: Experience working on nuclear sites. Experience of technical leadership in close collaboration with certified project managers. Other Duties: In addition to the responsibilities listed above, the post holder may be required to undertake other types of engineering work in response to fluctuations in resource requirements or to develop additional engineering competencies. Engineers may be required from time to time to enter radiation-controlled or beryllium-controlled areas. Appropriate PPE and training will be provided in advance. Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level. We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

A leading nuclear engineering company in London seeks a Site Delivery Lead for a permanent position. This role involves senior leadership in project execution, ensuring safety and compliance. Candidates should have a degree in Civil or Structural Engineering or Construction Management, with proven project management experience. Excellent benefits include hybrid working opportunities and a competitive pension scheme. Suitable for those with a strong background in large-scale infrastructure projects.

An international engineering company is seeking a People Business Partner in Bristol, UK. This senior HR role involves delivering high-quality people solutions across the employee lifecycle and requires expertise in Employee Relations. Key responsibilities include leading complex cases, providing expert guidance on UK employment law, and collaborating with senior leaders. Ideal candidates are CIPD Level 7 qualified with significant experience in complex organisations. This position offers a hybrid working model and opportunities for career progression.

Our Vacancy# People Business Partner Nuclear Permanent / Support Functions Bristol United Kingdom 16/02/26 On site ShareAssystem is an international company with one mission: accelerate the energy transition around the world. Every day, our 8,000 switchers located in 13 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy. We are a collective committed to making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition. Drawing on more than 55 years' experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked second in the world for nuclear engineering. We aim to ensure a viable, efficient, and reliable energy future for all. Job DescriptionThe People Business Partner is a senior HR professional responsible for delivering pragmatic, high-quality people solutions across the full employee lifecycle. Acting as a trusted advisor to senior leaders, you will translate business strategy and data into actionable people initiatives that enable performance, engagement and organisational effectiveness.This is a generalist role with deep expertise in Employee Relations. You will operate confidently and independently at senior level, managing complex and sensitive cases while influencing decision-making with sound judgement and commercial insight.Based in a hybrid working model with regular presence required in our Bristol office, the role also involves travel to other Assystem sites. Key areas of responsibility include: Partnering with senior leaders to deliver people strategy aligned to business objectives. Leading complex Employee Relations cases, including disciplinary, grievance, absence, performance, restructures, redundancy and TUPE. Providing expert interpretation of UK employment law to ensure fair, consistent and compliant outcomes. Coaching and influencing leaders to strengthen capability and accountability. Supporting organisational change, workforce planning and people-related projects. Using people data and ER metrics to identify trends, risks and improvement opportunities. Contributing to policy development, process improvement and continuous enhancement of People services.You will work closely with the Business Unit Director (dotted line to the Chief People Officer) and collaborate with the wider People Team to deliver a consistent, high-quality HR service. Your Profile CIPD Level 7 qualified (or equivalent). Significant experience managing complex and high-risk Employee Relations cases independently. Proven experience operating as a senior HR or People Business Partner within a complex organisation. Strong practical knowledge of UK employment law and the ability to apply it commercially. Demonstrated ability to influence and challenge senior stakeholders with credibility. Experience supporting organisational change and people-related projects. Strong analytical capability with confidence using people data to inform decisions. High levels of judgement, discretion and professional integrity. Competent and curious with AI.Chartered CIPD status, experience within an international environment and French language capability would be advantageous.Join one of the top three largest nuclear engineering companies globally and be a part of a dynamic team driving energy transition. At Assystem, we offer a multicultural environment, career progression opportunities, and the chance to work on industry-leading projects that make a real difference in the world. Please be aware that many roles at Assystem are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks. We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

A leading engineering company in Whitehaven, UK, is seeking a Principal Mechanical Engineer with strong nuclear sector experience. The role includes managing engineering requirements, mentoring team members, and ensuring compliance with standards. Candidates must have a minimum of HNC and significant experience in regulated industries. Proficiency in CAD and excellent communication skills are essential. This position offers the opportunity to innovate within the energy transition sector and contribute to impactful projects.

A global engineering and digital services company in London seeks a Principal Ecologist to lead their Ecology Consultancy team. This role involves providing senior technical leadership and managing ecological delivery across diverse projects, influencing from planning through to construction. Candidates should have a degree in Ecology or a related field, significant consultancy experience, and strong leadership skills. The position offers hybrid working arrangements, collaborative culture, and robust career progression opportunities.

Our Vacancy# Principal Ecologist Cross sector Permanent / London United Kingdom 13/02/26 On site ShareAs global challenges related to climate change, biodiversity loss, and sustainable development intensify, the role of ecological expertise has never been more critical. Our growing ecology practice is at the forefront of delivering practical solutions that promote environmental resilience, biodiversity conservation, and responsible land use. We support a wide range of projects-from infrastructure development and renewable energy to habitat restoration and environmental planning-by integrating ecological principles into every phase of design and decision-making. Our team of ecologists work closely with clients, communities, and stakeholders to ensure that development and conservation go hand in hand. With a strong focus on innovation, regulatory compliance, and long-term ecological health, we are committed to advancing a more sustainable and nature-positive future.Assystem is a global engineering and digital services company that plays a key role in large infrastructure projects, especially those related to complex, highly regulated industries. In the infrastructure sector , Assystem works across various domains to support the design, construction, operation, and maintenance of critical infrastructure. Job Description Assystem UK , you will step into a senior leadership role within our Ecology Consultancy team, influencing projects from early planning through to construction and operation while driving the growth and performance of the ecology practice itself. The Role As a Principal Ecologist, you will provide senior technical leadership, quality assurance and trusted client advice across complex, multidisciplinary project environments. You will work closely with clients, principal contractors and engineering teams, often embedded within live delivery settings where sound judgement, commercial awareness and clear direction are essential.You will ensure ecological risks are managed effectively, standards remain high and projects are delivered successfully both technically and commercially. Beyond project oversight, you will lead people, shape strategy and champion best practice across the ecology discipline. What You Will Be Doing: Team and Practice Leadership Lead, mentor and manage a team of ecologists across senior, mid-level and junior grades Align team resourcing with project demands, managing workloads and supporting recruitment where needed Promote best practice in ecology, health and safety, quality assurance and legislative compliance Drive continuous improvement and technical excellence across the ecology practice Project Oversight and Technical Direction Oversee ecological delivery across housing, infrastructure, renewables and energy projects Provide strategic ecological direction through planning, consenting and construction phases Lead and quality assure surveys, assessments, mitigation strategies and technical reports Provide high-level technical review of EIAs, HRAs, mitigation strategies and Biodiversity Net Gain assessments Oversee construction-phase compliance with wildlife legislation, licence conditions and mitigation commitments Lead protected species mitigation strategies and EPS licence preparation and delivery Investigate ecological incidents and implement proactive portfolio-wide risk management measures Strategic and Commercial Management Develop and implement growth plans aligned with wider business objectives Lead or support tenders, fee proposals, client presentations and framework bids Monitor project profitability, resource forecasts and overall performance of the ecology portfolio Ensure robust QA processes and effective risk management systems are embedded across projects Stakeholder and Client Engagement Act as a senior point of contact for clients, regulators, collaborators and partners Build and maintain strong professional networks to support business development Represent the ecology discipline internally and externally at industry events and forums Provide confident leadership within multidisciplinary coordination and client environments What You Will Bring You will hold a degree in Ecology, Environmental Science or a related discipline, supported by significant experience in applied ecological consultancy and leadership of complex infrastructure projects. You will also bring: Two European Protected Species licences Strong knowledge of UK wildlife legislation, planning policy and best practice including EIA, HRA and BNG Extensive experience managing teams, budgets and multidisciplinary project delivery Membership of the Chartered Institute of Ecology and Environmental Management, with Full Membership required if not already held Proven ability to deliver strategic, proportionate ecological solutions within complex live environments Excellent report writing, review and quality assurance capability Strong commercial awareness, business planning insight and client engagement skills A full UK driving licence and willingness to travel to project sites Desirable Experience A Full or Chartered member of the Chartered Institute of Ecology and Environmental Management Highly experienced in Ecological Clerk of Works duties and construction-phase leadership on major infrastructure schemes Experienced in Biodiversity Net Gain strategy and planning tools such as UKHab An established line manager and mentor within consultancy environmentsIf you are looking for a leadership role where you can influence strategy, grow a high-performing team and shape the ecological direction of nationally significant projects, this is your opportunity to make a lasting and visible impact. Additional Experience That Would Strengthen Your Application Hands-on experience delivering protected species mitigation Involvement in large-scale infrastructure schemes, such as Nationally Significant Infrastructure Projects Working knowledge of digital ecology tools, including GIS platforms and the Biodiversity Net Gain Metric What You Can Expect A senior leadership position within a well-established and expanding environmental practice A supportive and collaborative team culture Hybrid and flexible working arrangements Clear career progression pathways, dedicated training budgets and ongoing professional development supportWe are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.