Commercial Manager

Location: Suffolk

Contract: Permanent, full-time.

Closing Date: Friday 13th March 2026

We're building the future, and we need experienced Commercial Leaders to make it happen. Sizewell C is a once-in-a-generation infrastructure project that will power Britain's energy security and net-zero ambitions for decades to come. Following our recent Final Investment Decision, construction is fully greenlit. This is your chance to be part of the largest investment that will be providing clean, reliable nuclear energy to six million homes, cutting nine million tonnes of CO annually.

• Salary: Competitive
• Bonus: 5% annual incentive
• Pension: Up to 7.5% employee / 15% employer contribution
• Leave: 28 days holiday plus bank holidays
• Hybrid Working: Typically, 2-3 days in the office per week, with flexibility based on business needs

As Commercial Manager you will join our Supply Chain team and take ownership of the commercial management of Design, Engineering, and Construction contracts. You'll work closely with Programme Delivery, Finance, Legal, and suppliers to ensure contracts deliver on cost, quality, and schedule.

• Lead all commercial and contract management activities for complex projects.
• Administer NEC3/NEC4 or FIDIC contracts, including drafting clear contract documentation.
• Manage supply chain engagement, including procurement, subcontractor quotation reviews, and contract negotiations.
• Produce accurate cost reports, forecasts, and budgets, ensuring robust cost assurance.
• Represent the project in client facing commercial meetings.
• Mentor and guide Assistant Commercial Managers and junior team members.
• Support project controls and reporting using systems such as CEMAR, SAP, Oracle, or similar.

• Solid experience on major programmes or multi discipline projects.
• Strong understanding of NEC3/NEC4 or FIDIC contracts and contract administration responsibilities.
• Proven experience in a commercial or contract management role.
• Excellent numerical and analytical skills with the ability to produce accurate cost reports.
• A clear self starter, confident in taking ownership and seeking additional responsibility.
• Ideally Chartered status (RICS, ICE, CICES, IOB, CIPS or equivalent) or working towards.
• Stakeholder management and negotiation skills.

• Ideally Degree qualified in Quantity Surveying, Commercial Management or Engineering or related field.
• Experience in nuclear or regulated industries.
• Understanding of the UK nuclear regulatory environment and supply chain landscape.
• Familiarity with safety case and licence conditions in nuclear.
• Familiarity with project controls systems (CEMAR, SAP, Oracle).

• A major infrastructure project with national impact.
• Hybrid working with flexibility built in.
• Competitive salary, bonus and benefits.
• Clear progression and development opportunities.
• Supportive, collaborative team environment.

• Recognise the value brought from different cultures and experiences.
• Be open to other's points of view and ideas, be willing to debate and to compromise.

• Positively challenge poor quality and performance.
• Identify solutions at the lowest possible level.
• Encourage tier 1s and others to bring new ideas forward.

• Value the rules and environment in which we operate.
• Give and receive feedback with respect.
• Embrace and engage with new people and ideas.

• One team, working closely together and helping each other.
• Empowered teams always looking forward.
• Shared responsibility for delivery the project outcomes.

• Communicate clearly and consistently.
• Promote collaboration and team alignment.
• Clearer and faster decision making.
• Drive simplification at all levels.

We are looking for a dynamic, results oriented Commercial Manager who can drive commercial excellence in a complex, multi disciplinary environment.

To be appointed to this role, you will need to meet the criteria for Security Vetting, which will, ordinarily, require you to have been a resident of the UK for at least three of the past five years. Please note that export control compliance requirements apply to this role.

Join the team at Sizewell C. Our vision is to Lead The Way On Nuclear.

The Sizewell C team is one of the most exciting and largest new megaprojects in the UK, whilst being at the forefront of the UK's climate change agenda and energy policy. We have begun constructing a 3.2 gigawatt nuclear power station on the Suffolk coast in the East of England replicating, wherever possible, the design used for Hinkley Point C, another nuclear power station being built in Somerset.

When built, Sizewell C will be one of the largest power stations to operate in the UK. The power station will generate low carbon electricity for at least 60 years, supplying over 6 million homes and supporting around 7% of the UK's current electricity needs.

Our vision is to Lead The Way On Nuclear. We want Sizewell C to define what good leadership for the nuclear industry and British infrastructure looks like and deliver on it. We understand the feats of organisation, logistics, collaboration and imagination that building nuclear requires. We are building for the next generation for their home grown energy, energy price stability and ultra low carbon power in abundance. We also want to set the benchmark for maximising long lasting social value as we build and demonstrate how smart collaboration can work for the benefit of communities - locally, regionally and nationally.

We are the first nuclear power station in the UK to be funded under the Regulated Asset Base funding model (RAB). Our largest shareholder is the UK Government, alongside equity partners La Caisse, Centrica, EDF and Amber Infrastructure.

Sizewell C operates within a complex and fast moving stakeholder environment, engaging with a wide range of partners including government bodies, regulators, local communities, supply chain partners, and international collaborators. This makes Sizewell C a uniquely stimulating place to work - where navigating evolving priorities, balancing interests, and building trusted relationships is just as critical as technical excellence. For those who thrive in dynamic, multi dimensional settings, it offers unmatched professional challenge and growth.

When joining Sizewell C, you may wonder why you are contacted by colleagues with an EDF email or see the EDF logo on portals that you access and/or documentation you receive; this is because we have partnered with EDF for the provision of a number of support services whilst we complete a successful transition out of the EDF group.

At Sizewell C we encourage and embrace diversity and how it can improve our experience and performance at work. It is a requirement that those who join us have the right to work in the UK. Whilst sponsorship may be a possibility that we can explore, we are fully committed to local recruitment where possible, and those already holding the right to work in the UK.

By submitting an application to this role, you acknowledge that you have read and understood Sizewell C's employee privacy policy and EDF's employee privacy policy. Just to let you know, EDF will be processing and sharing information about your application on behalf of Sizewell C.