Senior or Principal Mechanical Engineer (Piping)

ASSYSTEM; Glasgow; On-site; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Pension scheme

25 days’ paid annual leave

Professional fees reimbursed

Job summary

ASSYSTEM is seeking a Senior or Principal Mechanical Engineer (Piping) to support nuclear and defence projects in the UK. You will lead piping design reviews, ensure compliance with UK/EU standards, and provide technical justification for design changes across multi-disciplinary teams.

The role emphasizes safety, reliability, and lifecycle support, with opportunities to advance to principal level and contribute to safety cases and hazard analyses in high-hazard environments.

Qualifications

• Proven experience as a Piping Engineer in industrial plant and machinery environments.
• Strong understanding of UK and European design standards and best practices.
• Familiarity with HAZID/HAZOP and safety case development.

Responsibilities

• Manage and assess design changes and concessions.
• Present design justifications to nuclear safety committees.
• Produce and maintain EIMT 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 environment.

Skills

Piping engineer

Nuclear standards

Hazard analysis

Pipe stress analysis

Multi-disciplinary teamwork

Security clearance

Education

HNC or equivalent

BEng/MEng

CEng status

Job description

Senior or Principal Mechanical Engineer (Piping)

• Full-time
• Type of contract ASSYSTEM: Contracting
• ASSYSTEM Sector: Defence

Assystem 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.

Join 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 Role

You’ll work alongside Mechanical, Civil, Structural, Electrical, and Building Services Engineers to:

• 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 environment

Experience

• 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 projects
• 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 & Training

• Minimum HNC (or equivalent) in a relevant engineering discipline
• Willingness to complete a Nuclear Introductory Course within 6 months (if from a non-nuclear background)
• Engineering Degree (BEng/MEng)
• Chartered Engineer (CEng) status

Due to the nature of this role the successful candidate will require Security clearance. To gain this they will be required to be aSole 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

Sole 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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