Senior Principal Mechanical Engineer - Nuclear Infra, Hybrid

Assystem; Glasgow; Hybrid; GBP 45,000 - 65,000; Full time

Benefits offered by this job

Hybrid work arrangement

Remote work 1–2 days/week

Job summary

Assystem is seeking a Mechanical Engineer to lead engineering activities on major defence infrastructure projects in a highly regulated setting. You will review designs, support safety cases, and work with multidisciplinary teams to ensure delivery from concept through commissioning.

The role requires a degree in mechanical engineering, Chartered status preferred, and experience across the full engineering lifecycle.

Qualifications

• Mechanical engineering experience on complex projects.
• Experience in safety-critical or high-hazard environments.
• Design assurance, technical review and governance experience.
• Knowledge of the full engineering lifecycle, from design to commissioning.
• Strong stakeholder engagement and collaboration skills.
• Experience working within multi-disciplinary engineering teams.

Responsibilities

• Lead and manage mechanical engineering activities across major infrastructure projects.
• Review and approve engineering designs, drawings and technical documentation.
• Support optioneering studies and development of innovative engineering solutions.
• Collaborate with multidisciplinary teams, contractors and key stakeholders.
• Support safety case development, hazard identification and risk management activities.
• Produce and review technical reports, assessments and engineering documentation.
• Provide technical assurance of contractor methods, risk assessments and work packages.
• Oversee construction, installation and deconstruction activities to ensure compliance with design requirements.
• Support commissioning and decommissioning activities, ensuring operational readiness.
• Drive compliance with Health, Safety, Environmental, Security and Quality standards.
• Contribute to technical guidance, knowledge sharing and professional development initiatives.

Skills

Mechanical engineering experience

Design assurance

Stakeholder engagement

Team collaboration

Lifecycle knowledge

Education

Degree in Mechanical Engineering

Chartered Engineer (CEng)

MSc or equivalent postgraduate

Job description

Assystem is seeking a Mechanical Engineer to lead engineering activities on major defence infrastructure projects in a highly regulated setting. You will review designs, support safety cases, and work with multidisciplinary teams to ensure delivery from concept through commissioning.

The role requires a degree in mechanical engineering, Chartered status preferred, and experience across the full engineering lifecycle.