Senior Commercial Manager (Sizewell C)

• Senior Commercial Manager
• Sizewell C
• Contract Type: Permanent - Office-based with hybrid flexibility (typically 3 days per week in office)
• Working Pattern: Full time
• Closing Date: Thursday 30th July 2026
• Location: London
• Salary: Circa £78,000 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
• Impact

Sizewell C is one of the UK’s most ambitious infrastructure projects—a next‑of‑a‑kind nuclear power station that will deliver clean, reliable energy for generations.

Following our Final Investment Decision, construction is fully greenlit.

This is your opportunity to play a key role in delivering a nationally significant project that will support Britain’s energy security and Net Zero ambitions.

• What You’ll Doing
• Leading the commercial management of major design programmes within heavy civils or large‑scale engineering and infrastructure projects.
• Managing and administering NEC3 and NEC4 PSC and bespoke SZC contracts, ensuring compliance with contract conditions and effective delivery.
• Preparing and maintaining key commercial documentation, including early warning notices, compensation events and programme submissions.
• Drafting position papers, prepare commercial reports and author change events to support project decisions.
• Applying your understanding of construction technology, cost drivers and supply chain management to optimise outcomes.
• Mentoring and developing Commercial Managers and Assistant Commercial Managers, building capability across the commercial function.
• Engaging with senior stakeholders and clients, providing clear advice and updates.
• Taking ownership of challenges and deliver solutions from start to finish.
• Contributing to strategic commercial planning and decision‑making to support project success.
• What You’ll Bring
• Proven experience in major projects and NEC3/4 contracts
• Strong commercial, negotiation, and stakeholder management skills
• Knowledge of UK contract law and procurement best practices
• Degree or equivalent experience
• Professional membership (RICS, ICES, CIOB, CIPS) desirable or working towards chartership.
• Why Join Us
• 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
• 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 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.
• Collaboration
• One team, working closely together and helping each other.
• Empowered teams always looking forward.
• Shared responsibility for delivery the project outcomes.
• Clarity
• Communicate clearly and consistently.
• Promote collaboration and team alignment.
• Clearer and faster decision making.
• Drive simplification at all levels.

If this sounds like the next step in your career, we’d love to hear from you. Apply today.

For this role you must have evidence of right to work in the UK.

As a project, we do not discriminate on the grounds of age, gender, race, colour, religion, disability or sexual orientation, and we welcome applications from all sections of the community.

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