The Client A leading specialist civils subcontractor that cover RC Frame/Groundworks and Demolition schemes across London and the Home counties. They have a current turnover of 160m and work on schemes up to 30m. The Role This client is seeking an experienced and commercially astute Senior Quantity Surveyor to join our team, managing a portfolio of complex and high-value projects in Central London. The ideal candidate will have extensive experience in cut and carve, structural demolition, strip-out, and RC works, ideally within the commercial, heritage, or high-end residential sectors. You will be responsible for the full commercial lifecycle of projects, from tender through to final account, ensuring profitability, compliance, and excellence in delivery. Lead commercial and contractual oversight on demolition, structural alteration, and enabling works packages. Prepare, manage, and track project budgets, cost plans, and CVRs. Conduct subcontract procurement, negotiation, and package management. Oversee valuations, applications for payment, variations, and final accounts. Ensure proper risk identification and mitigation through commercial controls. Work closely with site and project management teams to ensure alignment between operational and commercial strategies. Liaise with clients, consultants, and subcontractors professionally and proactively. Mentor and support junior members of the commercial team as required. Maintain full compliance with contractual and regulatory