Reactor Physicist

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.

About the opportunity

Are you a talented and ambitious individual looking to further your career in Reactor Physics? 

Amentum are currently recruiting for a Reactor Physicist to perform complex technical analyses, deliver technical training and support the theoretical development of our software and nuclear data products. 

The nuclear industry is moving away from traditional reactor designs towards new small modular reactor (SMR) and advanced modular reactor (AMR) designs, with improved safety features and lower build costs. These new concepts bring exciting new modelling challenges requiring the introduction of innovative new mathematics, physics, engineering and software engineering techniques. 

We are looking for an enthusiastic and innovative physicist to work in a variety of technical teams performing analysis work for a broad range of established and cutting-edge reactor designs. 

This role will present excellent opportunities for the continual development of skills and experience in physics, particularly as applied to nuclear engineering; also, the potential to lead technical developments and collaborations, and the teams responsible for their implementation. 

The role will be based at our Dorchester office with the opportunity to travel to client sites, as required. Some home / remote working is also available, and consideration will also be given in respect to part time & flexible working hours. Key Responsibilities will be:

• Developing underpinning mathematical and physical theories
• Performing complex reactor physics plant analysis
• Delivering technical training courses to a specialist audience
• Working as a team to develop and refine theoretical models and computational simulations
• Presenting results at technical meetings and conferences (where appropriate)
• Interfacing closely with the international academic research community
• Generating new business through interaction with international commercial customers

Qualifications

• An undergraduate degree in mathematics, physics or engineering, or any other subject with a strong mathematical component
• A strong background in mathematical and physical theory and implementation.
• Programming skills in languages such as Fortran, Python or Java
• Ability to think innovatively and to solve complex problems and able to quickly and efficiently absorb new technical skills
• Self-motivated, with a genuine passion for the field of nuclear physics
• Excellent problem-solving skills and the ability to work both independently and collaboratively

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.