Commissioning Engineer Mechanical

At Amentum, we'll inspire and empower you to deliver your best work so you can evolve, grow, and succeed – today and into tomorrow.  With more than 55,000 people in 40+ countries, working at Amentum offers an exciting range of opportunities to develop your career within a supportive and diverse team who always strive to do the right thing for our people, clients, and communities.

People are Amentums’ greatest asset, and we offer a competitive package to retain and attract the best talent. 

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family friendly benefits such as enhanced parental leave pay, free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. 

We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.

The Box Encapsulation Plant project is one of the most important construction projects at the Sellafield Site, the plant will play a vital role in Sellafield’s 100-year clean-up programme by taking nuclear waste recovered from the sites original wasteplants and encasing it in concrete so it can be stored in a modern building. The plant is primarily designed to deal with waste from the Magnox Swarf Storage Silo, one of four legacy waste plants prioritised for clean-up by Sellafield Ltd’s owner, the Nuclear Decommissioning Authority (NDA). Alongside that work, the plant will also receive certain wastes from the other three legacy waste stores, the First Generation Magnox Storage Pond, the Pile Fuel Storage Pond, and Pile Fuel Cladding Silo. 

The BEP Joint Venture project will safely design and deliver a Plant and the works in accordance with the requirements of the contract to enable conditioning of wastes from the various donor plants, carried out in line with the Employer’s needs and to the satisfaction of stakeholders in the Box Encapsulation Project (BEP).

The Commissioning Engineer reports to the Lead Commissioning Engineer. The Commissioning Engineer may have commissioning Technicians reporting in to them.

The Commissioning Engineer is responsible for:

• Ensure Safety is the highest priority on the project with a continued strive towards Zero Harm. He ensures that he is a role model for all aspects of safety, ensuring a proactive approach to nuclear, radiological, conventional and environmental safety.
• Carrying out all testing activities throughout all stages of commissioning.
• Identification of faults and ability to propose and implement solutions.
• Production of test documentation.
• Organisation of Commissioning Technicians and support resources.
• Initiation and implementation of FOBs and TQs.
• Witnessing of test activities.
• Validation of Working Level Instructions.

• 5 years’ project commissioning experience.
• Preference for HNC or equivalent or route to achieve the qualification.
• Time served or equivalent in an engineering discipline e.g. piping or electrical discipline.

Our Culture

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business and we truly believe that by supporting one another through our culture of caring, we all succeed. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion and diversity in everything w