Senior/Principal Mechanical Engineer
Confirmed on the employer's own hiring board on Sep 30, 2026. First seen by Alion on Sep 28, 2026. Assystem scores B on the Alion truth index.
Today, 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.
Mechanical Engineer | Defence Infrastructure
Join a high-profile infrastructure programme delivering complex engineering solutions within a secure and highly regulated environment. You'll play a key role in managing mechanical engineering activities, supporting design development, stakeholder engagement, and project delivery from concept through to commissioning.
Key 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.
What We're Looking For:
Essential
- Mechanical engineering experience on complex projects.
- Experience working 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.
⭐ Desirable
- Experience within Defence, nuclear or other highly regulated sectors.
- Knowledge of HAZID, HAZOP and safety case processes.
- Understanding of relevant engineering standards and regulations.
- Experience supporting major infrastructure projects.
Qualifications
- Degree qualified in Mechanical Engineering or a related discipline.
- Chartered Engineer (CEng) status.
- ⭐ MSc or equivalent postgraduate qualification desirable.
Why join the Switchers community?
Assystem has over 55 years of experience in nuclear engineering. We are among the top 3 largest nuclear engineering companies.
Attractive social benefits: an engaging and dynamic Employee Committee (CE), holiday bonuses...
Ongoing training throughout your career. Numerous career opportunities: 70% of our managers come from internal promotions!
1 to 2 days of remote work per week.
Umbrella Contractor or Permanent Staff position
The role would typically be expected to be conducted in a hybrid arrangement from Glasgow City Centre (3 days office, 2 days WFH).
SC required to commence role. Sole UK nationals only
Umbrella Contractor or Permanent Staff position
NOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.
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.