Commercial Manager

Sizewell C Ltd; Brighton; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading energy infrastructure company is seeking a Commercial Manager to oversee contract management for major engineering projects. You will ensure effective cost and quality outcomes while mentoring junior staff. Ideal candidates will have a strong background in contract management, excellent numerical skills, and ideally, hold a relevant degree. The role offers a competitive salary, flexibility with hybrid working, and an opportunity to contribute significantly to clean energy initiatives in the UK.

Benefits

Competitive salary

5% annual bonus

Pension contributions up to 22.5%

28 days holiday plus bank holidays

Qualifications

• Solid experience on major programmes or multi-discipline projects.
• Strong understanding of NEC3/NEC4 or FIDIC contracts.
• Proven experience in a commercial or contract management role.

Responsibilities

• Own commercial management of Design, Engineering, and Construction contracts.
• Lead contract management activities for complex projects.
• Administer NEC3/NEC4 or FIDIC contracts.

Skills

Contract management

Numerical and analytical skills

Stakeholder management

Negotiation skills

Education

Degree in Quantity Surveying, Commercial Management or Engineering

Tools

CEMAR

SAP

Oracle

Job description

Job Description

Shape Britain’s Energy Future with Sizewell C.

Location: Suffolk, Bristol or London
Contract: Permanent, full-time
Closing Date: Friday 9th January 2026

Why Join Us?

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 CO₂ annually. As a Commercial Manager, you’ll play a pivotal role in helping Britain achieve Net Zero and shaping the future of energy.

What’s in It for You

• 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

Your Impact

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.

What We’re Looking For

• 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 it.
• Stakeholder management and negotiation skills.
• Nice‑to‑haves: 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).

Behavioural Competences

• Humility – recognise the value brought from different cultures and experiences; be open to others’ points of view and ideas, be willing to debate and to compromise.
• Positivity – positively challenge poor quality and performance; identify solutions at the lowest possible level; encourage tier 1s and others to bring new ideas forward.
• Respect – value the rules and environment in which we operate; give and receive feedback with respect; embrace and engage with new people and ideas.
• Solidarity – one team, working closely together and helping each other; empowered teams always looking forward; shared responsibility for delivery of the project outcomes.
• Clarity – communicate clearly and consistently; promote collaboration and team alignment; clearer and faster decision making; drive simplification at all levels.

Additional Information

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… (company description continues in paragraph form).

Important Details for Applicants

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.

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.

Equality and Diversity

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.