Commercial Manager

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 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. 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 Nuclear Power Programmes has been formed with the vision to support positive change and help shape the future of Nuclear Power. Operational throughout the UK and across continental Europe, we are seeking to expand our team on a variety of nuclear projects, which range in technologies and that find themselves at different stages of their development. To do this, we are seeking to continuously employ talented individuals to join our diverse team that are excited about nuclear projects and are committed to Net Zero, and Energy Security. In both client facing and internal roles we are delivering major programme and project management capabilities throughout the project lifecycle. We are driving to deliver safe, high quality and to time solutions by thinking innovatively and working collaboratively. Responsibilities will include: People & Leadership Champion safety, wellbeing, and a strong values‑driven culture. Lead, motivate, and develop high‑performing, diverse teams. Drive vision, strategy, and sustainability (Plan Beyond). Deliver strong people outcomes (engagement, capability, performance). Customers & Growth Build and maintain strong customer and stakeholder relationships. Deliver value‑driven, innovative solutions aligned to customer needs. Support business strategy, growth, and market differentiation. Contribute to sales performance (pipeline, win rates, client satisfaction). Delivery Excellence Ensure compliant, ethical, and efficient commercial operations. Drive innovation, sustainability, and continuous improvement. Manage contracts end‑to‑end (suppliers, procurement, change, payments, final accounts). Lead commercial teams and resolve complex challenges proactively. Here’s What You’ll Need: We’re looking for a proven and experienced Senior Commercial Manager, with experience in FIDIC and NEC 3&4 suite of contracts and major projects, as well as knowledge of UK law and its impact upon the contracts and commercial function. You’ll also demonstrate a good understanding of procurement, contract performance measurement, risk, change and claim management. You’ll be able to work across multiple discipline teams to develop, implement, and operate commercial strategies and contractual agreements. You’ll have a big‑picture view and be able to develop and execute innovative approaches to commercial delivery for the benefit of the project. Member of the RICS / CICES / IOB / CIPS or equivalent professional body is desirable. If the above sounds like you, then we’d love to hear from you! 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 in everything we do. We know that if we are inclusive, we’re more connected, and 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. We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit 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. #J-18808-Ljbffr