Piping & Welding Engineer

At Assystem, our mission is to accelerate the energy transition worldwide. Across the UK, our 7,500 Switchers combine world-class engineering know-how with cutting-edge digital tools to power complex infrastructure projects. With a strong presence in nuclear, we're helping to design, build, and secure the low-carbon energy systems of the future.

Join one of the three largest nuclear engineering companies in the world. At Assystem, you’ll contribute to some of the most complex energy projects on the planet and collaborate with a community that values technical excellence, innovation, and engineering impact on a global scale.

This Piping & Welding Engineer role sits within the Review & Acceptance Branch at Hinkley Point C. You will also engage in embedded steelwork review as part of the transition from civil to fit-out activities.

Your responsibilities include:

• Respond to site contractor queries on piping systems, supports, and welded connections
• Review non-conformances, change requests, and exemption requests with technical rigour
• Ensure piping design complies with nuclear safety and environmental requirements
• Coordinate with Responsible Designers and on-site technical experts as needed
• Review interface issues between piping layouts and embedded steelwork (e.g., Pools, Tanks, Liners)
• Support welding-related assessments and pipework fabrication queries
• Evaluate and close open technical points impacting installation and commissioning
• Transition into fit-out scope as civil works complete, supporting mechanical and electrical systems

Essential Skills:

• Degree in Mechanical Engineering
• Proven experience in piping systems design, layout, and installation
• Strong understanding of welded piping joints and fabrication standards
• Familiarity with ASME/EN piping and welding codes
• Knowledge of steelwork interfaces in industrial environments
• Familiarity with pipe supports and pressure system compliance
• Ability to resolve technical issues across multi-disciplinary teams
• Confident working with contractors, design offices, and site personnel

Desired Skills:

• Nuclear project experience, preferably new build
• Working knowledge of H&S and Nuclear Site Licence requirements
• Understanding of civil-to-mechanical transitions during construction
• Experience working in large-scale, highly regulated projects

This is your opportunity to play a central role in one of Europe’s largest nuclear infrastructure programmes. If you’re ready to lead on-site engineering solutions across piping, welding, and civil interfaces, this role offers technical depth and long-term opportunity.

Benefits include:

• Hybrid Working Opportunity
• 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 hours
• Employee referral scheme

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.