Amentum will 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 and diverse 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. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations. 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 As a Principal Physicist you will be expected to lead medium to large projects or tasks independently, you may oversee teams working on those projects. You will be responsible for technical delivery of the tasks and technical interactions with clients, setting scope and providing solutions to our clients problems. Key skills required: Detailed knowledge and experience within a physics discipline required in the nuclear industry such as transient analysis, reactor physics, shielding, thermal hydraulics, etc Significant experience within the nuclear sector or academia leading challenging technical projects Ability to assimilate, analyse and provide judgements on complex technical issues clearly and concisely Good consultancy skills, eg, good communication, teamwork, be adaptable to client requirements and time management skills. Likely to have experience interacting with senior clients, regulators or other senior stakeholders Good commercial awareness and how to effectively solve client issues in a commercially competitive environment Familiar with nuclear safety assessments and safety case construction Qualifications Nuclear masters and PhDs preferred or Degree or Post Graduate qualification in a relevant engineering or scientific discipline Ability to assimilate, analyse and provide judgements on complex technical issues clearly and concisely Good consultancy skills, eg, good communication, teamwork, be adaptable to client requirements, time management skills 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 genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees. We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we're more connected, and if we are diverse, we're more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you're pregnant or on family leave. This is reflected in our wide range of Global Employee Networks centered on inclusion and diversity. We partner with VERCIDA to help us attract and retain diverse talent. 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.