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 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:** The Assurance, Technology and Regulation performance unit, is a critical part of the Technology and Consulting business within CMS-I. AT&R 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 control and instrumentation support to both defence and civil nuclear sectors? Then this is the opportunity for you. We are seeking to recruit a Thermal-Hydraulicist to join our Nuclear, Science and Engineering (NSE) team in Birchwood, Cheshire This role provides a diverse and exciting range of opportunities, undertaking Independent Nuclear Safety and Technical assessment to support the safe operation of all classes of UK submarines across the entire plant life cycle. From initial concept design through to plant life extension and subsequent decommissioning, this work presents interesting and unique technical challenges and therefore requires a strong commitment to deliver robust safety assurance services to the Ministry of Defence (MoD) in support of the UK’s defence requirements including it’s continuous at sea deterrent. This role will be of particular interest to candidates with experience in thermal hydraulic modelling who are seeking to broaden their knowledge of the application of codes within design and safety cases. **Key responsibilities will include:** Providing independent nuclear safety and technical assessment of documents relating to naval nuclear propulsion plant systems and performance + presenting advice to relevant safety and technical committees. + Representing the business at safety and technical meetings with clients, propulsion plant designers and safety case authors. + Applying personal skills and technical experience to support subject matter experts from other disciplines and projects. You will have the following skills, attributes and experience. Applicants with thermal analysis experience from other industries are also welcomed as comprehensive training will be provided for all successful candidates. + 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, based on knowledge and understanding. + Experience of undertaking thermal hydraulics calculations of Pressurised Water Reactors and/or performance calculations, including; faults, severe accident, loss of cooling and decay heat removal conditions; + Experience of providing assurance activities (formal independent assessment, advice and inspection) in safety or mission critical applications; + Experience of carrying out Independent Nuclear Safety Assessments. + Knowledge of Pressurised Water Reactor systems for naval propulsion or civil power generation applications; + Familiar with modelling codes used within the naval nuclear propulsion or civil power generation programmes; + Applicants with thermal analysis experience from other industries are also welcomed as comprehensive training will be provided for all successful candidates. + You will be required to hold or have the ability to achieve full UK security clearance **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 centred on inclusion and diversity. We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visitwww.vercida.comto 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. Your application experience is important to us and we’re keen to adapt to make every interaction even better. We welcome feedback on our recruitment process and if you need more from us before deciding to join us then please let us know.