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 To provide expert Commercial leadership and support across nuclear decommissioning projects, ensuring robust cost management, contract administration, and commercial governance. The role is critical in supporting safe, compliant, and cost-effective delivery of complex decommissioning programmes. Other responsibilities: Lead cost estimation, budgeting, and forecasting activities across decommissioning projects. Administer contracts (e.g., NEC3/4) including change control, payment applications, and final accounts. Support procurement and tendering processes with accurate cost data and commercial input. Monitor and report on project financial performance, identifying risks and opportunities. Ensure compliance with regulatory and governance frameworks including NDA and ONR requirements. Engage with project teams, suppliers, and stakeholders to ensure commercial alignment. Contribute to continuous improvement and lessons learned in cost and contract management Qualifications Proven experience as a Senior Quantity Surveyor in infrastructure or regulated sectors. Strong knowledge of NEC contracts and public sector procurement regulations. Demonstrable experience in cost management, contract administration, and commercial reporting. Relevant qualifications (e.g., RICS, BSc in Quantity Surveying or equivalent). Experience in nuclear decommissioning or high-hazard environments. Familiarity with NDA governance and funding models. Knowledge of sustainability and social value in commercial delivery. Proficiency in cost management tools and digital systems. Any offer of employment will be strictly subject to the relevant security requirements for the role being met. This means that you will need to have, or be able to obtain, Baseline Personnel Security Standard (BPSS) clearance and either Security Check (SC) or Developed Vetting (DV) clearance. The security clearance process may require non-British nationals or dual nationals (i.e. those with British and another nationality) to be subject to additional evaluation, depending on nationalities held and the nature of the work to be carried out 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. 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) .