Senior Commercial Manager

Sizewell C; Bristol; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading infrastructure project in the UK is seeking a seasoned commercial professional to manage major programmes in heavy civils and infrastructure projects. You'll oversee NEC3 and NEC4 contracts, mentor junior staff, and contribute to strategic decision-making. The ideal candidate has a degree or equivalent experience, strong negotiation skills, and familiarity with UK contract law. The role offers a competitive salary based on experience, a 5% annual bonus, 28 days of holiday plus bank holidays, and a market-leading pension scheme.

Benefits

Health cover

Cycle-to-work scheme

Discounts & more

Ongoing professional development

Qualifications

• Extensive experience delivering major programmes in heavy civils or large‑scale engineering.
• Strong understanding of construction technology, cost drivers, and supply chain management.
• Familiarity with NEC3/NEC4 contracts, particularly in contract management and administration.

Responsibilities

• Lead commercial management of major programmes within heavy civils or large-scale engineering projects.
• Manage and administer NEC3 and NEC4 Engineering and Construction Contracts.
• Mentor and develop junior team members in the commercial function.

Skills

Commercial management

Negotiation

Stakeholder management

Education

Degree or equivalent experience

Professional membership (RICS, CICES, IOB, CIPS)

Job description

• Lead the commercial management of major programmes within heavy civils or large-scale engineering and infrastructure projects.
• Manage and administer NEC3 and NEC4 Engineering and Construction Contracts, ensuring compliance with contract conditions and effective delivery.
• Prepare and maintain key NEC documentation, including early warning notices, compensation events and programme submissions.
• Draft position papers, prepare commercial reports and author change events to support project decisions.
• Apply your understanding of construction technology, cost drivers and supply chain management to optimise outcomes.
• Mentor and develop junior team members, building capability across the commercial function.
• Engage confidently with senior stakeholders and clients, providing clear advice and updates.
• Take ownership of challenges and deliver solutions from start to finish without the need for direction.
• Contribute to strategic commercial planning and decision‑making to support project success.
• We're looking for a seasoned commercial professional with extensive experience delivering major programmes, ideally within heavy civils or large‑scale engineering and infrastructure projects valued between £10m and £100m+. You'll bring a deep understanding of construction technology, cost drivers, and supply chain management, combined with strong working knowledge of NEC3/NEC4 contracts—particularly in contract management and administration. Your ability to draft position papers, author change events, evaluate complex quotations, and produce clear commercial reports will set you apart. Proven experience in major projects and NEC3/4 or FIDIC contracts.
• Strong commercial, negotiation, and stakeholder management skills.
• Knowledge of UK contract law and procurement best practices.
• Degree or equivalent experience.
• Professional membership (RICS, CICES, IOB, CIPS) desirable; Humility.
• 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.
• 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.
• 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 chance to lead at scale and play a pivotal role in Britain's journey to energy security and Net Zero.
• Salary: Competitive salary (depending on experience).
• Bonus: 5% annual target.
• Holiday: 28 days + bank holidays.
• Pension: Market‑leading (up to 7.5% employee / 15% employer).
• Benefits: Health cover, cycle‑to‑work scheme, discounts & more.
• Hybrid working & ongoing professional development.