Mechanical Commissioning Engineer

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.

Your future team:

You will be joining a dynamic and collaborative commissioning team on-site at our Client In Derby which is a Nuclear Licensed Site.

This is an exciting opportunity for a contractor looking to contribute to a critical project and work within an embedded team .

This role will be based in Derby and will initially be working a 2-shift pattern Monday to Friday. There is a high possibility that it will increase to a 3-shift pattern from February 2026.

Your Missions:

Author and manage commissioning test procedures and prepare safe systems of work

Maintain accurate records of test results

Conduct commissioning tests and analyze results

Communicate effectively and manage processes

Carry out Commissioning duties on systems such as; Nuclear, conventional and environmental safety systems, wastewater tanks, Nuclear qualified cranes.

Why join the community of Switchers?:

Assystem has over 55 years of experience in nuclear engineering. We are among the top 3 largest nuclear engineering companies.

Collaborative Environment: Join a dynamic team of experts who are passionate about driving progress and supporting each other's growth.

PROFILE

Your strengths and prerequisites for success

Experienced with commissioning Gas, Fluid and Vacuum systems and Mechanical handling equipment

Familiar with Licence Condition 21 site arrangements, Health and Safety standards, permits, and safety case adherence

To able to perform initial operator duties during commissioning testing phases. (i.e., Non active commissioning).

Previous Experience of witnessing, supervision, and acceptance of vendor and supplier testing on-site.

Skilled in authoring test procedures and reports

Understanding of design, construction, and handover processes

Please be aware that many roles at Assystem are subject to both security and export control restrictions.

• These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation.
• All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.

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 !.

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.