Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements.
Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.
Job DescriptionYour 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 concepts, scheme definitions, and full detailed design solutions using CAD software, including Inventor.
🎯 Work on piping systems, mechanical flow diagrams, and the production of general arrangement, assembly, component, and fabrication drawings.
🎯 Produce scoping calculations and component specifications that meet BS/ISO standards and legal requirements (e.g., LOLER, EMUA).
🎯 Ensure designs adhere to the AEIL Quality Management System, delivering work within agreed time scales, costs, and quality standards.
Why join the community of Switchers?
As one of the Top 3 Nuclear Engineering companies in the world, Assystem offer a competitive benefits package which includes:
💥25 days of annual leave + bank holidays
💥8% company pension contributions
💥Healthcare cash-plan to get money back on dental, medical, physical care
💥Employee assistance programme including 24/7 access to free mental health support, virtual gym classes and more
💥Get professional and industry membership fees paid for..
QualificationsQualifications/Skills to be successful:
✔️ HND in an applicable engineering/design discipline preferred or HNC with relevant experience.
✔️ Extensive experience in mechanical design in line with BS/ISO standards.
✔️ Proficiency in 2D and 3D CAD software.
✔️ Experience with design for manufacture, pipework, pressure vessels, and structural steelwork.
✔️ Experience with Autodesk Revit and GD&T (desirable).
✔️ Familiarity with BS8888 and ASME Y14.5 drawing standards (desirable).
Additional Information- Contract Role
- Sole UK National
- BPSS
- Hybrid working
NOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.
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.
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.









