Our Vacancy

Principal Mechanical Engineer

  • Nuclear
  • Permanent /
  • Warrington
  • 21/09/23
  • On site

Assystem is an international company with one mission: accelerate the energy transition around the world.

Every day, our 6,500 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 second in the world for nuclear engineering.

To ensure a viable, efficient, and reliable energy future for all.

Job Description

Principal Mechanical Engineer


Permanent / Contractor


My profile


  • Engineering professional with high-level technical competency and experience working within a related field
  • HNC (minimum)
  • Innovative – to be able to create and develop new ideas (challenge the norm)
  • Preparing project documentation, processes, reports and arranging engineering reviews
  • Considerable experience (demonstrable) of successful stakeholder management
  • A strong understanding of drawing standards (BS8888) and deep knowledge of ISO-GPS (ISO 8015), including the ability to specify requirements
  • Ability to demonstrate SQEP against checking of technical drawings (BS8888, ISO 8015)
  • A sound engineering background with deep experience of general design and manufacture – able to review current intent and, where appropriate, challenge aspect of design and manufacture – experience of material selection, welding, fabrication techniques and general machining (including limitations)  
  • Knowledge of DFMEA / PFMEA
  • Excellent communicator – Written and verbal
  • Experienced in delivering work for highly regulated industries
  • Experience of nuclear sector
  • Familiarity or previous design experience with Nuclear (including mechanical handling)

Experience of CAD (Inventor)

  • SC Clearance (preferred) or the ability to obtain SC Clearance.

BPSS minimum.

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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