Senior or Principal Mechanical Engineer (Piping)

Our Vacancy# Senior or Principal Mechanical Engineer (Piping)* Defence* Contracting /* Glasgow* United Kingdom* 10/11/25* Hybrid work* ShareAssystem is an international company with one mission: accelerate the energy transition around the world. Every day, our 7,500 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy. We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition. Drawing on more than 55 years’ experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked third in the world for nuclear engineering. To ensure a viable, efficient, and reliable energy future for all.## Job Description Piping Engineer – Nuclear Engineering (Assystem) Location: Central Glasgow (Hybrid: 2–3 days/week onsite) Type: Staff or Umbrella ContractorJoin Assystem’s dynamic, multi-disciplinary engineering team supporting one of our major client . As a Piping Engineer, you’ll play a key role in ensuring the safety, reliability, and compliance of infrastructure across major operational sites. Summary of the RoleYou’ll work alongside Mechanical, Civil, Structural, Electrical, and Building Services Engineers to:* Develop and maintain Infrastructure Design Substantiation documents* Manage and assess design changes and concessions* Present design justifications to nuclear safety committees* Produce and maintain EIMT (Examination, Inspection, Maintenance & Testing) schedules* Review and assess Periodic Safety Reviews and technical documentation* Provide expert technical advice to internal and external stakeholders* Apply advanced piping and process design principles in a nuclear/high-hazard environmentExperienceEssential: Proven experience as a Piping Engineer in industrial plant and machinery environments Strong understanding of British & European design standards and best practices* Practical experience across concept, detailed design, and construction stages (preferably industrial or maritime projects)* Skilled in design assessment of plant and equipment to withstand hazards* Proficient in pipe stress analysis Capable of producing robust technical justifications and documentation for design modifications in high-hazard industries* Experienced in contributing to multi-disciplinary engineering projectsDesirable: Previous experience in high-risk or nuclear environments Familiarity with HAZID/HAZOP and safety case development Experience in the UK nuclear industry (energy or defence), including safety-related structures, systems & components Knowledge of UK and US nuclear regulations, codes, and standards Qualifications & TrainingEssential: Minimum HNC (or equivalent) in a relevant engineering discipline Incorporated Engineer status or equivalent experience Willingness to complete a Nuclear Introductory Course within 6 months (if from a non-nuclear background)Desirable: Engineering Degree (BEng/MEng)* Chartered Engineer (CEng) statusDue to the nature of this role the successful candidate will require Security clearance. To gain this they will be required to be a Sole UK national.Benefits include: 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* Employee referral schemeSole UK National, Security Clearance required to start.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.
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