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.

Key Responsibilities

TOC Assurance & Commercial Governance

• 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.

Procurement & Pre-Construction Support

• 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.

Risk & Cost Assurance

• 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.

Stakeholder Management & Governance

• 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.

Leadership Responsibilities (Senior Level)

• 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.

Essential Requirements

• 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, and cost risks.
• Strong analytical, negotiation, communication, and stakeholder management skills.
• Degree qualified in Quantity Surveying, Commercial Management, Civil Engineering, Construction Management, or a related discipline.

Desirable Experience

• Direct experience reviewing, developing, or assuring TOC/Target Cost submissions.
• Working knowledge of NEC contracts, Project Alliance Agreements (PAA), or similar collaborative contracting models.
• Understanding of QSRA/QCRA methodologies, Monte Carlo risk analysis, contingency management, and quantitative risk assessment techniques.
• Experience gained with Tier 1 contractors, consultancies, client organisations, or major project programmes.
• Professional accreditation such as MRICS, MCICES, or equivalent.

Level Expectations

Project Manager – TOC Assurance

• Supports assurance reviews and validation activities across individual packages.
• Provides detailed commercial and cost analysis.
• Contributes to governance reviews and stakeholder engagement activities.
• Typically requires strong infrastructure commercial, estimating, or quantity surveying experience.

Senior Manager – TOC Assurance

• Leads assurance reviews across multiple packages and governance forums.
• Provides strategic commercial challenge and independent assurance.
• Influences senior stakeholders and supports key investment decisions.
• Demonstrates extensive experience in major project commercial management, assurance, procurement, and risk-based cost governance.

Why Join Sizewell C?

This is an opportunity to play a key role in one of the UK's largest and most strategically significant infrastructure projects, influencing major commercial decisions and helping to ensure cost certainty, value for money, and robust delivery across a multi-billion-pound heavy civils programme.