About

• 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.

• Shift Work?: No
• Career area: Sizewell C
• Primary Contractual Location: 25 Copthall Avenue
• Term of Employment: Permanent