We are seeking an experienced Senior Quantity Surveyor to join a major Transport for London (TfL) Design & Build project involving the construction of a new wheel lathe facility. This is an excellent opportunity to play a key commercial role on a high-profile rail infrastructure project being delivered under an NEC3 Option C Target Cost Contract. Reporting to the Commercial Lead, you will be responsible for the commercial management of civils and fit-out subcontract packages valued at approximately £6 million, while contributing to the successful delivery of the wider £32 million programme. Key Responsibilities * Commercial management and administration of civils and fit-out subcontract packages * Supporting the Commercial Lead with project cost reporting, forecasting, and financial controls * Management, assessment, and negotiation of change control and compensation events under NEC3 Option C * Preparation and review of subcontract valuations, payments, and variations * Assisting with procurement activities, tender evaluations, and appointment of remaining work packages * Cost management throughout the project lifecycle, including final account agreement * Monitoring project performance against target cost and budget objectives * Working collaboratively with project delivery, design, planning, and client teams to achieve commercial and operational objectives * Supporting risk and opportunity management processes * Ensuring contractual compliance and robust commercial governance Candidate Requirements * Proven experience as a Quantity Surveyor or Senior Quantity Surveyor within rail, infrastructure, civils, or major construction projects * Strong working knowledge of NEC3 contracts, particularly Option C Target Cost * Experience managing compensation events and change control processes * Background in Design & Build project environments * Excellent commercial acumen with strong reporting and forecasting skills * Experience managing subcontractor accounts from procurement through to final account settlement * Strong communication and stakeholder management abilities