Senior Cost Manager in Leiston

Join one of the UK's most significant nuclear infrastructure projects and play a pivotal role in shaping the financial performance of a nationally important programme.

We are seeking an experienced Senior Cost Manager to join a high-performing Project Controls team supporting the delivery of Sizewell C.

This is an outstanding opportunity for a project controls professional to take ownership of cost management activities on a complex, large-scale infrastructure programme. Working at the heart of project delivery, you will provide the financial insight, forecasting expertise and performance analysis required to support key programme decisions and drive successful outcomes.

You will work closely with programme leadership, project managers, commercial teams and finance professionals, ensuring cost performance is accurately understood, effectively controlled and clearly communicated to stakeholders.

For professionals who enjoy influencing decision-making, challenging assumptions and improving project performance through robust cost management, this role offers the chance to make a genuine impact on one of the UK's most important energy projects.

Key Responsibilities

• Lead the production, analysis and review of programme cost performance information.
• Manage forecasting activities including EAC, ETC and cost trending to support effective decision-making.
• Deliver accurate and insightful cost reports for project and programme leadership teams.
• Apply Earned Value Management principles to assess performance and identify emerging risks or opportunities.
• Analyse complex cost and performance data, translating findings into meaningful management information.
• Provide challenge and assurance on forecast accuracy, cost assumptions and programme performance.
• Support budget management, change control and programme re-baselining activities.
• Work collaboratively with Commercial and Finance teams to ensure alignment between project controls, contracts and financial reporting.
• Assess the cost impact of programme changes and support robust change management processes.
• Drive continuous improvement across cost management procedures, systems and reporting tools.
• Support senior stakeholders with clear financial insight to enable informed project delivery decisions.

What We're Looking For

• Proven experience in Cost Management or Project Controls within major infrastructure, energy, engineering, defence, rail, utilities or nuclear programmes.
• Strong understanding of cost control, forecasting, budgeting and performance reporting.
• Experience applying Earned Value Management (EVM) within complex project environments.
• Advanced analytical skills with the ability to interpret large and complex datasets.
• Experience using cost management systems such as EcoSys, PRISM, Cobra or similar tools.
• Strong stakeholder engagement skills and the confidence to challenge constructively where required.
• Excellent communication skills with the ability to present complex information clearly to senior audiences.
• Degree qualified or equivalent industry experience.

Why Join?

Sizewell C represents a once-in-a-generation infrastructure programme that will play a vital role in the UK's future energy security and net-zero ambitions.

• As a Cost Manager, you will have the opportunity to:
• Influence major programme decisions on a nationally significant project
• Work with experienced Project Controls, Commercial and PMO professionals
• Develop your expertise within a highly complex delivery environment
• Build long-term career opportunities within the growing nuclear and infrastructure sectors
• Contribute to a project that will have a lasting impact for generations to come

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