Senior Commercial Manager

Sizewell C Limited; Greater London; Hybrid; GBP 90,000 - 140,000; Full time

Benefits offered by this job

Hybrid working

Professional development

Bonus: 5% annual target

Holiday: 28 days + bank holidays

Pension: Market-leading (up to 7.5% N

Job summary

Sizewell C Company is seeking a seasoned commercial professional to lead the management of major contracts in large-scale engineering and infrastructure projects. You will administer FIDIC/NEC3/4 contracts, draft position papers, and deliver clear commercial reports while guiding a growing team.

You will engage with senior stakeholders and clients, manage risk, and contribute to strategic commercial planning to support project delivery and ongoing improvements.

Qualifications

• Experience delivering major programmes on large-scale engineering projects.
• Strong commercial, negotiation and stakeholder management skills.
• Familiarity with FIDIC or NEC3/4 contracts.
• Knowledge of UK contract law and procurement best practices.
• Degree or equivalent experience.

Responsibilities

• Lead the commercial management of major contracts within large-scale engineering and infrastructure projects.
• Prepare and administer contract documentation, including early warning notices, variations and claim responses.
• Understand and administer price fluctuation clauses.
• Draft position papers, prepare commercial reports and author change events.
• Engage with senior stakeholders and clients, providing clear advice and updates.
• Mentor and develop direct reports and early-career team members.

Skills

FIDIC experience

Commercial skills

Negotiation

Stakeholder management

Team leadership

Analytical thinking

CEMAR knowledge

UK contract law

Procurement knowledge

Education

Degree or equivalent experience

Tools

CEMAR Contract Management

Job description

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 underway. This is your chance to lead at scale and play a pivotal role in Britain’s journey to energy security and Net Zero.

What’sin It for You

• Bonus: 5% annual target
• Holiday: 28 days + bank holidays
• Pension: Market-leading (up to 7.5% employee / 15% employer)
• Hybrid working & ongoing professional development.

We’re looking for a seasoned commercial professional with extensive experience delivering major programmes, ideally within large-scale engineering and infrastructure projects valued between £10m and £100m+. Experience in industries such as Energy (Nuclear, Wind, Solar, Oil and Gas), Datacentres and the like will be highly regarded. You’ll bring a deep understanding of construction technology, cost drivers, and supply chain management, combined with a strong working knowledge of FIDIC (highly desirable) and NEC3/NEC4 contracts; particularly in contract management and administration. Your ability to draft position papers, evaluate variations, evaluate complex quotations, manage risk and produce clear commercial reports will set you apart.

WhatYou’llDo

• Lead the commercial management of major contracts within large-scale engineering and infrastructure projects.
• Manage and Administer FIDIC Contracts, ensuring compliance with contract conditions and effective delivery.
• Prepare andmaintainkey contract documentation, including early warning notices, variations and claim responses.
• Understand and administer price fluctuation clauses.
• Be articulate in drafting position papers, prepare commercial reports and author change events to support project decisions.
• Apply your understanding of construction technology, costdriversand supply chain management to optimise outcomes.
• Manage, mentor and develop direct reports and early-career team members, building capability across the commercial function.
• Engage confidently with senior stakeholders and clients, providing clear advice and updates.
• Engage with team members and contractors in a confident, professional, and collaborative manner, fostering constructive relationships while assertively ensuring that the client’s contractual rights and obligations are always protected. 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.
• Manage and contribute to ongoing continuous improvement initiatives.

WhatYou’llBring

• Proven experience in major projects and FIDIC (highly desirable) or NEC3/4 contracts
• Strong commercial, negotiation, influencing, problem solving, communication and stakeholder management skills
• Team-oriented mindset, and fosters innovation and collaboration
• Ability to absorb complex information and assess requirements and make recommendations
• Experience of CEMAR Contract Management platform desired but not essential
• Knowledge of UK contract law and procurement best practices
• Degree or equivalent experience

Behavioural Competences

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 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.
• 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.
• Drive simplification at all levels.