Senior Quantity Surveyor | Major UK Infrastructure Programme A leading commercial consultancy requires a Senior Quantity Surveyor to deliver commercial leadership on a Tier 1 main contractor's high-value infrastructure programme. This strategic site-based role in West Ruislip offers direct influence over contractual outcomes, cost performance, and commercial strategy within a complex civil engineering environment. Immediate requirement to replace existing resource. Role Overview The successful Senior Quantity Surveyor will assume full commercial ownership of allocated post-contract work packages, ensuring robust financial control and contractual compliance. This is a senior appointment involving the direct line management and mentorship of two Quantity Surveyors and lots of client and stakeholder engagement. Focus is on high-fidelity cost reporting, aggressive cost avoidance, and definitive final account settlement. Core Responsibilities Lead all post-contract commercial management across defined work packages. Provide leadership to the commercial team, ensuring consistent governance and contractual application. Manage the full lifecycle of change control, compensation event valuation, entitlement assessments, and prolongation claims under the NEC form of contract. Drive and conclude final account agreements, scrutinizing and auditing cost legitimacy across the supply chain. Own the cost control function, producing high-accurac...