Senior Quantity Surveyor | Hertfordshire (Office Based) | Main Contractor Join a long-established design & build contractor delivering technically complex commercial and residential schemes across London and the South East. You'll take ownership of full project commercial management from early-stage budgets and procurement through to final accounts supporting a portfolio of live projects ranging in value from £2m to £10m. This is a hands-on, standalone role working closely with the Construction Director and project teams, offering autonomy, visibility, and the opportunity to influence both project and business outcomes. The Role • Full commercial management of residential and self-storage projects (£210m) • Prepare and manage construction budgets and allocate costs across work packages • Procure subcontractors, plant, and materials, and assist in consultant procurement • Agree main contract terms and subcontract agreements • Manage client and subcontractor valuations, variations, and payments • Monitor costs and produce monthly forecasts and cost reports • Lead on final accounts for both client and subcontractors • Provide commercial input on design development and value engineering • Attend and contribute to design and pre-construction meetings • Produce weekly commercial summaries for review with the Chief Executive • Prepare build bud...