Project Manager​/Heavy Civils

Location: Hybrid (London – 3 days per week) with occasional travel to Leiston, Suffolk

An exciting opportunity to join the Sizewell C programme in a client-side TOC Assurance function, supporting the assurance, validation, and governance of Target Outturn Cost (TOC) submissions across major heavy civil engineering packages.

The role can operate at either Project Manager or Senior Manager level depending on experience and will play a critical part in ensuring that contractor submissions, procurement strategies, cost estimates, risk allowances, and pre-construction plans are robust, transparent, auditable, and aligned with programme objectives.

You will work closely with commercial, procurement, engineering, delivery, and risk teams, providing independent challenge and assurance across cost, schedule, risk, and commercial assumptions while supporting key governance and decision-making processes.

• Review, challenge, and validate Target Outturn Cost (TOC) submissions across major heavy civils packages.
• Assess cost build-ups, estimates, pricing methodologies, assumptions, labour productivity, indirect costs, and contractor commercial proposals.
• Evaluate risk allowances, contingencies, escalation assumptions, and commercial provisions to ensure value for money and programme alignment.
• Identify commercial, delivery, cost, and schedule risks, opportunities, and inconsistencies within submissions.

• Support procurement activities including tender evaluations, scope reviews, Bills of Quantities (BoQ) assessments, contractor clarifications, and commercial discussions.
• Ensure alignment between procurement outcomes and TOC development.
• Review contracting strategies and commercial frameworks, ensuring compliance with project governance requirements.
• Support contract reviews, negotiations, and commercial decision-making processes.
• Review and challenge QSRA/QCRA outputs, Monte Carlo analyses, contingency assessments, and risk management methodologies.
• Conduct cost benchmarking, validation exercises, and assurance reviews to test the robustness of contractor submissions.
• Monitor emerging cost trends, commercial performance, and programme risks.
• Assess and challenge value engineering proposals and cost optimisation initiatives.

• Facilitate and contribute to assurance reviews, workshops, governance forums, and commercial review meetings.
• Collaborate with commercial, engineering, procurement, delivery, and project controls teams.
• Build effective relationships with contractors, consultants, and senior project stakeholders.
• Produce clear analysis, reports, recommendations, and assurance findings to support executive decision-making.
• Lead assurance reviews across multiple heavy civils packages.
• Coordinate multidisciplinary assurance activities and drive consistency of approach across the programme.
• Provide mentoring and technical guidance to junior team members.
• Act as a key interface with senior stakeholders and lead governance discussions relating to TOC approval and commercial assurance.
• Proven experience within major infrastructure, nuclear, transportation, energy, water, or heavy civil engineering projects.
• Strong background in quantity surveying, commercial management, estimating, cost planning, pre-construction, or procurement.
• Experience working in target cost, collaborative contracting, or major project delivery environments.
• Ability to critically analyse and challenge complex cost data, estimates, and contractor submissions.
• Sound understanding of cost planning, estimating methodologies, commercial governance, and infrastructure delivery.
• Experience identifying and managing commercial, delivery,…