Company Description
About Assystem
Assystem is an international engineering and project management group accelerating the energy transition worldwide. Our 8,000 Switchers combine decades of engineering expertise with digital innovation to deliver complex, safety-critical infrastructure. In the UK, we play a key role on landmark programmes including Hinkley Point C, Sizewell C and emerging Small Modular Reactor developments, supporting the delivery of secure, low-carbon energy for the future.
Why Join the Community of Switchers?
You will be joining one of the three largest nuclear engineering companies in the world, working at the heart of the UK's most significant energy programme. Assystem offers exposure to world-class projects, long-term career stability, and the opportunity to work alongside highly experienced engineers and delivery teams. Your future team values collaboration, practical problem solving, and engineers who want to make a real impact on site.
Job Description
The Job Mission
This is a hybrid role for candidates living within commutable distance to Bridgwater or Bristol, with relocation support available.
You will provide mechanical engineering expertise to support delivery of complex systems across major nuclear new build programmes. Your future team depends on you to ensure technical alignment, constructability, and quality across mechanical scopes.
Coordinate design activities for mechanical equipment and plant layout
Produce and revise technical specifications for new equipment scopes
Manage technical queries, changes, and non-conformances within scope
Interface with piping, HVAC, civil and wider engineering teams
Review and approve contractor deliverables and design submissions
Maintain and update 3D models and technical documentation
Ensure compliance with nuclear safety and quality standards
Track engineering risks and coordinate mitigation actions
Qualifications
Skills and Qualifications
Nuclear experience is not essential, but is of course welcome. If you have worked within a highly regulated environment, your skills and approach are highly transferable and of strong interest to us.
We also recognise that the perfect candidate rarely exists. If you feel you meet around 80% of the criteria and are motivated to develop further, we would strongly encourage you to apply.
Degree qualified in Mechanical Engineering or related discipline
Experience with mechanical equipment such as valves, piping, HVAC, rotating and static equipment
Proficiency in 3D design software including Navisworks and 3DCAD tools
Background within highly regulated or safety critical industrial sectors
Strong understanding of technical reports and engineering design cycles
Knowledge of industrial standards and mechanical interface management
Ability to communicate effectively with stakeholders and suppliers
Proven experience resolving technical queries and engineering challenges
Additional Information
Ready to Make an Impact?
This is an opportunity to contribute to nationally significant energy infrastructure while developing your technical depth within a globally recognised engineering organisation. If you want real responsibility, exposure to complex mechanical systems, and the chance to grow within one of the world's leading nuclear engineering companies, this role offers long-term progression and stability.
Benefits include:
Hybrid Working Opportunity
Flexible working hours
Market Leading Pension scheme (8% company contribution / 4% personal contribution)
25 days' paid annual leave + bank holidays + option to buy or sell days
Professional fees reimbursed
Employee referral scheme
Competitive Sick Pay – Support when you need it
Income Protection & 3x Salary Death-in-Service Cover
Free Digital Gym Access – Expert-led fitness classes
24/7 Employee Support Line – Mental health, financial & legal help
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.
1. ASSYSTEM Job: Engineering / Technical
2. Type of contract ASSYSTEM: Permanent
3. ASSYSTEM Sector: Nuclear