Commercial Manager

Amentum; Lakenheath; Hybrid; GBP 90,000 - 120,000; Full time

Job summary

Amentum is seeking a Commercial Manager for the Sizewell C project to lead commercial management across the contract lifecycle, from procurement to close-out. You will act as the primary commercial contact, supporting governance, supplier relationships, risk management and commercial outcomes.

The role requires strong experience in major projects, NEC/FIDIC contracts, and effective stakeholder engagement within highly regulated sectors. Hybrid working arrangements in the UK are available.

Qualifications

• Strong contract management on major projects.
• Knowledge of NEC and FIDIC contracts.
• Experience with procurement, negotiations, contract administration, claims and risk management.
• Excellent stakeholder management, communication and influencing skills.
• Sound financial and commercial decision-making capabilities.
• Understanding of UK regulatory and construction environments.
• Experience in regulated sectors such as nuclear, energy, infrastructure or construction is desirable.

Responsibilities

• Manage commercial aspects of assigned contracts from pre-award to close-out.
• Support procurement activities including ITTs, tender evaluations, negotiations, and contract award.
• Administer NEC/FIDIC contracts, including change control, claims, risks, and reporting.
• Build and maintain strong supplier, contractor, and stakeholder relationships.
• Ensure compliance with governance processes and business objectives for SZC.
• Produce commercial dashboards, reports, and contract records.
• Support and develop Supply Chain Assistants.
• Collaborate with Procurement, Legal, Project Controls, and Delivery teams.

Skills

Contract management

NEC/FIDIC contracts

Procurement negotiations

Stakeholder management

Financial & commercial decisions

UK regulatory environment

Nuclear/energy sector experience

Education

Degree in QS/Commercial Management/Engineering

RICS/CICES/CIOB membership (preferred)

Job description

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. The Commercial Manager is responsible for the commercial management of contracts throughout the full lifecycle, from procurement and contract award through to delivery and final account close-out. Acting as the primary commercial contact, the role supports contract performance, governance, supplier relationships, risk management, and commercial outcomes across the Sizewell C project.

Key Responsibilities

• Manage commercial aspects of assigned contracts from pre-award to close-out.
• Support procurement activities including ITTs, tender evaluations, negotiations, and contract award.
• Administer NEC/FIDIC contracts, including change control, claims, risks, and commercial reporting.
• Build and maintain strong supplier, contractor, and stakeholder relationships.
• Ensure compliance with SZC governance processes and business objectives.
• Produce commercial dashboards, reports, and contract records.
• Support and develop Supply Chain Assistants.
• Work closely with Procurement, Legal, Project Controls, and Delivery teams.

Essential Skills & Experience

• Strong commercial and contract management experience on major projects.
• Knowledge of NEC and FIDIC contracts.
• Experience with procurement, negotiation, contract administration, claims, and risk management.
• Strong stakeholder management, communication, and influencing skills.
• Sound financial and commercial decision-making capability.
• Understanding of UK regulatory and construction environments.
• Experience working in highly regulated sectors such as nuclear, energy, infrastructure, or construction is desirable.

Qualifications

• Degree qualified (preferred) in Quantity Surveying, Commercial Management, Construction, Engineering, or similar.
• Working towards or holding membership of RICS, CICES, or CIOB (preferred).

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 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.

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