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** Amentum is the Design and Engineering partner for Sellafield under the PPP (Programme and Project Partners). This is a 20-year arrangement to deliver ~£7bn of major projects. We are looking to recruit high value expertise from across regulated and comparable sectors to work in a collaborative environment. PPP is delivering major projects, site wide improvements and provision of supporting services. **The Project** The Sellafield Product and Residue Store Retreatment Plant (SRP), being delivered by the Programme and Project Partners (PPP), will safely receive all special nuclear material packages from existing storage locations across the Sellafield site before retreating them into new 100-year packages for safe storage. The SRP facility will enable all special nuclear material to remain safe and secure in its store into the next century and beyond and therefore plays a key role in delivering Sellafield’s purpose to create a clean and safe environment for future generations. **The Role** SRP now has an exciting opportunity for a  **Senior Mechanical Engineer** with DJR experience to join the team in Birchwood, Warrington. As a  **Senior Mechanical Engineer** your responsibilities could include: + Managing and directing designers in delivery of mechanical plant and equipment. + Production and checking of Design justification reports (DJRs) + Prioritising work to support manufacturer schedules. + Working knowledge of plant layout, set up, installation and alignment of plant and equipment and machinery for works test, integrated test and site installation. + Writing and checking works test requirement documentation and Integrated works test documents for Plant, Equipment and machinery. + Writing and checking O&M manuals. + Experience in providing support to resolution of manufacturing, inspection and test Technical Queries/production permits/concessions. As a  **Senior Mechanical Engineer**  you will already have: + Degree qualified in Mechanical Engineering or equivalent (e.g. HNC/HND with significant experience) in engineering discipline. + DJR Experience + Attained/ or working towards chartered or incorporated status with a recognised professional body (e.g. IMechE). + Experience of highly regulated environments would be advantageous. + Experience in the use of Auto desk inventor + Experience and working knowledge of CDM, SoMSR, PUWER & LOLER **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 (http://www.vercida.com) 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. 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 andy.condliffe@global.amentum.com Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters (https://postings.govdocs.com/#/vxSkbztPuAwwxfs) .