Commercial Manager - Sizewell C

About the role

Amentum's Nuclear Power Programmes, operating across the UK and continental Europe, is expanding its team on nuclear projects at different stages of development. The Commercial Manager is responsible for the commercial management of contracts throughout their full lifecycle, from procurement and contract award through to delivery and final account close-out. Acting as the primary commercial contact, the role covers contract performance, governance, supplier relationships, risk management and commercial outcomes across the Sizewell C project.

Key responsibilities

• Manage the commercial aspects of assigned contracts from pre-award to close-out.
• Support procurement activities including ITTs, tender evaluations, negotiations and contract award.
• Administer NEC and 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.

Required profile

• Strong commercial and contract management experience on major projects.
• Experience in highly regulated sectors such as nuclear, energy, infrastructure or construction is desirable.
• Degree qualification (preferred) in Quantity Surveying, Commercial Management, Construction, Engineering or similar.
• Working towards or holding membership of RICS, CICES or CIOB (preferred).

Required skills

• Knowledge of NEC and FIDIC contracts.
• Experience with procurement, negotiation, contract administration, claims and risk management.
• Sound financial and commercial decision-making capability.
• Understanding of UK regulatory and construction environments.

What we offer

• Competitive package for UK employees, including 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.
• Reimbursement towards professional development and memberships.
• Hybrid, part-time and flexible working arrangements discussed on a case-by-case basis.