At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.
Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.
We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive team who always strive to do the right thing for our people, clients and communities.
People are our 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 and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships.
Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.
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 site’s 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).
About the Opportunity
The Lead Commissioning Engineer reports to the Area Commissioning Team Leader. The Lead Commissioning Engineer will have Commissioning Engineers and Technicians reporting to them.
The Lead Commissioning Engineer is responsible for:
1. Ensuring 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
2. Leading a team of commissioning Engineers and Technicians
3. Leading all testing activities throughout all stages of commissioning
4. Supervising the production of commissioning test documentation
5. Supervising and organising of Commissioning Technicians and support resources
6. Supervising the initiation and implementation of FOBs and TQs
7. Liaising with the regulatory compliance representatives to ensure witnessing of commissioning activities is expedited
8. Recording and management of Temporary Commissioning Aids
Experience & Qualifications:
9. Time served or equivalent in an engineering discipline piping or electrical discipline
10. Preference for HNC or equivalent or route to achieve the qualification
11. Previous project commissioning experience
12. IOSH Managing/Working Safely or equivalent
Our Culture
Our values are built on a strong foundation of safety, integrity, and respect for every individual. People are at the heart of our mission, and we believe in supporting one another through a culture of care and collaboration.
We strive to create a workplace where everyone feels they belong and can thrive. Supporting mental wellbeing and fostering a sense of connection are essential to how we work.
When we embrace different perspectives and work together, we become more innovative, more agile, and more successful.
We partner with VERCIDA, for greater online accessibility please visit to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.
If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team.