Senior Piping Engineer

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.

Senior Piping Engineer

Location: Warrington

Employment type: Staff or Contract (Inside IR35)

• Produce engineering design work packages (specification, drawings, analysis, verification or assessment of engineering) that satisfy legal and functional requirements and associated performance conditions within agreed time, cost and quality.
• Work within an asset care delivery function on operational facilities, supporting implementation of asset care projects during construction/installation/commissioning, and responding to engineering queries and fault observations.
• Familiarize with and comply with applicable Sellafield practices, processes, engineering standards, and engineering guides.

• Degree in Mechanical Engineering with a minimum of 5 years’ design delivery experience or an equivalent qualification such as HNC/HND with 10+ years’ design delivery experience.
• Experience working within a highly regulated industry, preferably nuclear.
• Proven ability to deliver safe, fit‑for‑purpose, fully integrated and operable design solutions that meet product requirements.
• Experience producing design deliverables (product requirement specifications, technical reports, calculations, drawings/layouts, installation method statements, risk assessments, design substantiation).
• Experience in mechanical piping design with knowledge of relevant standards and legislation (e.g., ASME B31.3, PER, PSSR).
• Familiarity with machine design and mechanical handling, including regulations (e.g., Supply of Machinery (Safety) Regulations, LOLER, PUWER).
• Familiarity with British and ISO standards and compliance requirements.
• Ability to liaise with stakeholders across diverse technical and non‑technical backgrounds.
• Experience working in integrated, multi‑disciplinary design teams.
• Experience in peer reviewing/checking reports, drawings (proposal & detail), and supporting calculations.
• Experience leading a team of designers in producing layouts, GAs, isometrics, fabrication drawings, etc.

Whilst we encourage applications from all nationalities, Assystem within the UK are subject to security and export control restrictions due to the nature of work to be undertaken. These restrictions mean that factors including your nationality, any previous nationalities you have held, and/or your place of birth may limit those roles that you can perform for the organisation.

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.