⚡️💡 About Assystem
Assystem is a global leader in engineering, digital, and project management services, driving the UK’s energy transition since 1996. With 7,500 Switchers worldwide, we combine deep engineering expertise with digital innovation to deliver complex, low-carbon infrastructure. In the UK, we’re proud to support landmark nuclear projects like Hinkley Point C, Sizewell C, and emerging SMR programmes.
🤝 Why Join the Community of Switchers?
Join one of the three largest nuclear engineering companies in the world. Here, you'll work on world‑class energy‑transition missions, collaborating with top teams delivering Hinkley Point C, Sizewell C and SMRs. Become part of an elite global community, driving innovation and excellence every day.
Job Description
🚀 The Job Mission
We are seeking a Mechanical Design Engineer to support the delivery of operating equipment, specifically valves and fluid handling equipment. This is a hybrid role (2 -3 days in the office) and involves working closely with external suppliers and ensuring successful integration of equipment into the plant.
Your future team will rely on you for:
- Creating and amending technical specifications for new equipment scopes.
- Performing surveillance and approval of contractor deliverables and design activities.
- Supporting technical and project meetings with suppliers and internal stakeholders.
- Assisting in resolving multi-disciplinary technical issues, including addressing interface queries and design changes.
- Coordinating technical specialists for reviewing deliverables and resolving technical concerns.
- Reviewing and providing input on contract amendments and exemptions.
- Liaising with RD and client teams to ensure proper equipment integration.
Qualifications
🛠 Essential Skills & Qualifications
- Strong understanding of mechanical interfaces (piping, fluids, radioprotection, safety).
- Good knowledge of valves and fluid handling systems
- Capable of producing high-quality technical specifications
- Sound understanding of mechanical engineering regulations in safety-critical environments
✔️ Desired Skills
- Previous experience working on large-scale industrial projects
Additional Information
🌟 Ready to shape the future? Join your future team on-site at one of the most ambitious nuclear power projects in Europe. Be part of a collaborative mission to uphold the highest construction and quality standards.
Benefits include:
🏡 Hybrid Working Opportunity
🕒 Flexible working hours
🛡️ Pension scheme (8% company / 4% personal)
🏖️ 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 & 3× 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.
Top Skills
What We Do
Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition. We see ourselves as an activist in the development of nuclear energy, convinced that it is an essential part of the fight against climate change. 7,000 switchers, spread in 12 countries in Europe, Asia, Africa and the Middle East are working every day to make the energy switch by accelerating the development of nuclear and renewable energies, power grids, clean hydrogen projects and low-carbon transport. We design and supervise major projects through our engineering activities and accelerate our customers' digital transformation. We also develop new solutions to build faster and improve the performance of complex infrastructures. 55 years of experience have made Assystem a key partner of the world's largest industrial groups: CEA, EDF, ENEC, Enedis, Engie, Framatome, ITER, K.A. CARE, Naval Group, NICDC, Orano, RATP, Rolls Royce, Royal Commission, Sellafield, SGP, SNCF... Assystem is ranked in the Top 3 companies in the nuclear energy sector.
