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About the Role

Sizewell C is an exciting phase of growth as we mature into an independent organisation and continue building one of the UK’s largest and most important energy projects. We are looking for an experienced commercial professional with a strong track record in major infrastructure, engineering, or construction projects. Ideally, you'll have experience within heavy civils and knowledge of NEC3/NEC4 contracts. You'll be confident managing commercial activities across allocated contracts or work packages, supporting project teams, assessing change, managing risk, and helping to deliver successful commercial outcomes.

Responsibilities

Manage the commercial administration of allocated contracts and work packages within major infrastructure projects.
Administer NEC3 and NEC4 contracts, ensuring compliance with contractual obligations and project procedures.
Prepare and manage commercial documentation, including early warning notices, compensation events, payment assessments, and programme submissions.
Review and evaluate quotations, subcontractor submissions, and change proposals.
Support the preparation of position papers, commercial reports, forecasts, and cost analysis.
Work collaboratively with project, engineering, procurement, and supply chain teams to ensure effective commercial delivery.
Identify, manage, and mitigate commercial risks and opportunities.
Build strong relationships with internal and external stakeholders, providing clear commercial advice and support.
Contribute to cost control, change management, and commercial governance processes.
Support senior commercial leadership in achieving project and business objectives.

Requirements

Proven experience working within commercial management on major construction, infrastructure, engineering, or heavy civils projects.
Good working knowledge of NEC3 and/or NEC4 contracts.
Strong commercial awareness, contract management, and negotiation skills.
Experience preparing and administering compensation events, early warnings, and payment applications.
Ability to analyse commercial data and provide clear recommendations.
Strong stakeholder management and communication skills.
Knowledge of UK contract law and procurement practices.
Degree-qualified or equivalent industry experience.
Professional membership (RICS, ICES, CIOB, CIPS) desirable or working towards chartership.
Must meet the criteria for Security Vetting, which ordinarily requires UK residency for at least three of the past five years.

Skills

Commercial management
NEC3/NEC4 contracts
Contract management
Negotiation
Compensation events
Early warnings
Payment applications
Commercial data analysis
Stakeholder management
Communication
UK contract law
Procurement practices

Location

London

Work Type

Permanent
Office-based with hybrid flexibility (typically 3 days p/w in the office)
Full time

Experience Level

Experienced

Education Level

Degree-qualified or equivalent industry experience

Salary/Compensations

Circa £66,000 depending on experience

Benefits

5% annual incentive
Pension: Up to 7.5% employee contribution / 15% employer contribution
Holiday: 28 days plus bank holidays
Flexible benefits
Clear progression and development opportunities
Supportive, collaborative team environment

About the Company

Sizewell C’s business is to design, finance, construct, commission, operate, maintain, and eventually decommission the nuclear power plant and related infrastructure at Sizewell C in Suffolk.
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.
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%.
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 UK’s largest and most important energy projects.
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.
We encourage and embrace diversity and how it can improve our experience and performance at work.

Equal Opportunity

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.