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HomeCareer Senior Mechanical Engineer

Our Vacancy

Senior Mechanical Engineer

  • Nuclear
  • Permanent /
  • Sunderland
  • 21/06/24
  • 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

The role is an exciting opportunity for a Senior Mechanical Engineer to join the Fusion and Modular Nuclear Business Unit. You will join an expanding team to support the development and delivery of work packages for our nuclear, marine, and O&G clients based around our Sunderland office. The role supports Hybrid working. As the Senior Mechanical Engineer your role will include:

  • Taking the lead on assigned project tasks, capable of managing and planning projects for a team of engineers and liaising with project management facilities.
  • Producing high quality engineering solutions and outputs covering a broad range of engineering topics and activities.
  • Communicating and providing feedback of technical development and project delivery to the Lead Engineer and the Project Manager.
  • Leading small teams of engineers to deliver engineering tasks as part of a project team.
  • Providing technical guidance and mentoring to other team members especially junior or graduate engineers.
  • Manage your own time to deliver within agreed timescales, target cost and quality standards, requiring minimum supervision.

My profile

  • Minimum 2:1 BEng qualification in Mechanical Engineering (or equivalent). Master level qualifications are preferable.
  • Able to demonstrate relatable experience in a senior engineering role in a relevant industry sector such as offshore, renewables, nuclear or other highly regulated sectors.
  • Good experience and appreciation for mechanical and structural engineering.
  • Experienced user of Autodesk Inventor, AutoCAD and/or Catia CAD software, i.e. capable of using unassisted.
  • A strong mathematical background and experience of MathCAD software.
  • Good experience with producing technical (engineering) reports, e.g. design & substantiation, assembly procedures etc.
  • Good understanding/knowledge of manufacturing processes, e.g. welding, machining etc.
  • Experience with the engineering design cycle of mechanical designs from Concept through to Manufacture.
  • Experienced in the checking and approving of engineering CAD assemblies and detailed engineering/General Arrangement/fabrication drawings.
  • Experienced in the checking and approving of engineering documentation, such as manual calculations, reports etc.
  • Experienced with the analysis of strength and endurance of materials including fatigue analysis through manual and FEA based calculations.
  • Capable of reviewing tender documentation to provide detailed specification analysis and advise technical approach.
  • Experienced user of European and Offshore standards, for example Eurocode 3 and DNV.
  • Excellent Finite Element Analysis skills, in-depth knowledge of ANSYS workbench is desirable.
  • Experienced in the production checking and approval of non-linear and fatigue FEA using DNV and Eurocodes.
  • Desirable to have experience with FEED of offshore installation equipment.
  • Experience with design review processes, for example design review gates.

Additional Requirements:

  • BPSS and SC required
  • To undertake work packages supporting major UK and international Nuclear Clients.

Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level.


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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