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.

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.

About the Opportunity

The Assurance, Technology and Regulation(AT&R) performance unit, is a critical part of the Technology and Consulting business and has been providing critical services to the nuclear industry for over 60 years.

Do you want to play a vital role in existing and new defence and civil nuclear programmes in the UK, and want to provide key physics support to both defence and civil nuclear sectors?

We are looking for a full time Senior Physicist/Consultant to join our Reactor and Radiation Physics Team at our Birchwood office, to carry out independent nuclear safety and technical assessment of nuclear submarine propulsion plant, and support criticality and shielding safety case development in support of the civil nuclear sector and other safety critical infrastructure.

The NS&E department provides the technical capability, within defined subject matter areas, in support of our Independent Assurance (IA) function, which is a crucial activity, demonstrating to regulators and other key stakeholders that technical proposals and activities have been subject to independent scrutiny and challenge.

Our expertise of over 30 experienced scientists and engineers covers all aspects of nuclear safety, including design studies and modelling. Our range of experience ranges from advice at concept stage through the whole lifecycle of Reactor Plant.

Key Responsibilities

• Assessment of safety cases.

• Assessment of design technical cases.

• Providing formal independent nuclear safety and technical assessment of documents relating to the Physics aspects of nuclear propulsion and delivering the assessment output in formal letters, which may be presented to relevant safety and technical committees. 

• Performing assurance activities (Physics trails and testing).

• Contributing to Research projects in reactor physics and associated technologies.

• Representing us at safety and technical meetings with clients, the plant authorisee, designers and safety case authors.

• Applying your personal skills and experience to other projects being carried out by us, including shielding and criticality assessments for clients in the civil nuclear industry.

Here's What You'll Need  

• Criticality and radiation shielding assessment,

• Reactor Plant Physics analysis and performance

• Independent nuclear safety assurance including safety assessment of relevant safety cases, and technical assessment of reactor designs,

• Criticality safety analysis,

• Radiation shielding,

• Mathematical methods and modelling.

• Criticality safety, reactor physics or shielding analysis. 

• Submarine reactor design and safety case

• Civil reactor design and safety case

• Shielding and radiological safety case development and assessment

• Use of physics analysis codes

• Understanding of the UK Regulatory and Assurance Environment

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 www.vercida.com 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.