Mechanical Engineer

⚡️💡 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.

🚀 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

🛠 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

🌟 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.