Senior Cost Manager

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Company Description

Job Description

Sizewell C. The power of good for Britain.

Senior Cost Manager

Location: Based in London on a hybrid basis with travel to Suffolk as required.

Contract: Permanent, full-time.

Salary: Competitive dependant on experience, plus benefits

Benefits include:

• Annual Leave: 28 days per annum, increasing to 30 days after 5 years of service, plus bank holidays.
• Bonus: 5% annual bonus.
• Pension Contributions: Defined Contribution Pension Scheme with up to 7.5% employee contribution 15% employer contribution.

Closing Date: Thursday 5th March 2026.

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.

About the Role

We are seeking an experienced and commercially astute Senior Cost Manager to join the Sizewell C project team. This is a pivotal role responsible for leading cost management activities across major contracts and work packages within a complex, multi-billion-pound infrastructure environment.

You will work closely with project controls, commercial, procurement, engineering, and delivery teams to ensure robust cost planning, forecasting, reporting, and governance throughout the project lifecycle.

About You

• Significant experience in cost management within major infrastructure, nuclear, energy, or construction projects
• Proven track record managing large, complex contracts (£100m+)
• Expertise in cost forecasting, earned value management and risk analysis
• Excellent stakeholder management and communication skills
• Degree qualified in Quantity Surveying, Commercial Management, Engineering, or related discipline

Why Join Us?

• Be part of one of the most important low-carbon energy projects in the UK.
• Work in a mission-driven environment that values innovation, integrity, and long-term sustainability.
• Competitive salary, comprehensive benefits, and opportunities for career development.
• Flexible and hybrid working options.

Key Competencies

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 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 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.