Snr Commercial Manager

Snr Commercial Manager - London

Sizewell Cs business is to design, finance, construct, commission, operate, maintain, and eventually decommission the nuclear power plant and related infrastructure at Sizewell C in Suffolk. Overall, whilst the Company is in the construction phase, the Boards principal focus is on the development and construction of Sizewell C on time, on budget and to the highest quality and safety standards. The Company is maturing to meet all these requirements.

Sizewell C is economically regulated by OFGEM under the Regulated Asset Base (RAB) model similar to other UK electricity distribution networks and Thames Tideway.

Sizewell C construction strategy is to replicate the design of Hinkley Point C, using the majority of the same supply chain, but innovating in the way it is delivered to achieve savings in time and cost of around 20%. The CCO will need to be guided by and incorporate lessons learned from the Hinkley Point C commercial delivery to achieve Sizewell Cs ambition.

Following Financial Completion and Revenue Commencement, Sizewell C is fully funded and is owned by; The Secretary of State for Energy Security and Net Zero representing HM Government, La Caisse, Centrica, EDF and Amber Infrastructure.

Sizewell C is entering an exciting phase of growth as we mature into an independent organisation and continue building one of the UKs largest and most important energy projects. We are now recruiting for the below position.

Senior Commercial Manager - Civil Works Programme

Contract Type: Permanent -Office-based with hybridflexibility(typically 3 days p/w in the office)

Working Pattern: Full time

Closing Date: Friday 4th September 2026

Location: London

Salary: Circa 82,000 depending on experience

Bonus: 5% annual incentive
Pension: Up to 7.5% employee contribution / 15% employer contribution
Holiday: 28 days plus bank holidays

Benefits: Flexible benefits

About the Role

Reporting To: Commercial Lead Civil Works, As Senior Commercial Manager you will support the effective implementation of the Programme Alliance Agreement (PAA) - a multi billion pound, multiparty alliancing contract - across Sizewell C (SZC) processes, systems and teams.

The role will focus on assisting in the identification and resolution of interface gaps between PAA contractual requirements and SZC functional processes, providing expert advice to Commercial teams and functions, developing contract management guidance, and training, and supporting the use and development of the Unifier contract administration tool.

This role suits a bigpicture thinkersomeone who can evaluate options, risks and consequences to shape effective solutions. Working proactively with functions such as design, project controls (cost, programme, risk), delivery, legal, land, consents, environment and sustainability, site operations, health and safety, quality and document control, the Senior Commercial Manager brings clarity, alignment and confident decisionmaking to highpressure, fastmoving environments. The role ensures robust governance, identifies gaps in contracts, policies and procedures, and strengthens commercial controls across the programme.

Key Responsibilities

The scope of this role evolves and is guided by the challenges faced by SZC and their contractor teams. Current key responsibilities include assisting the Commercial Lead in the following areas:

PAA Contract Management:

• Acting as a subject matter expert on the PAA.
• Identifying and resolving gaps between contractual requirements and SZC processes.
• Providing practical commercial advice to contractor teams and functions.
• Supporting consistent contract administration and governance across the programme.
• Promoting dispute avoidance through proactive issue resolution.

Training, Guidance and Capability

• Developing training materials, guidance and templates for the use of the PAA.
• Producing and supporting roll-out of the Contract Management Manual.