We''re growing fast and we''re looking for a commercially strong, operationally sharp Senior Project Quantity Surveyor to help shape the next stage of our journey.We are looking for someone to take ownership of all post-award commercial and scope-validation activities once a project is marked "Closed Won" in Salesforce. This includes verifying the BOQ, undertaking site surveys, preparing operational scopes and cost sheets, managing valuations, and ensuring commercial control throughout the delivery of fire doors, fire stopping, and wider passive fire protection projects.Why Join Us?This isn''t just another QS role, it''s a chance to shape the commercial direction of a growing specialist contractor.You''ll get: A pathway to Commercial ManagerDirect influence over profitability, strategy and operational excellenceExposure to high-profile, prestigious estates across London and the UKA high-performance, digitally-enabled working environment25 days holiday + bank holidaysPension + ongoing development opportunities About Onyx Fire and SecurityOnyx Fire and Security is one of the UK''s leading fire safety specialists, delivering critical life-safety systems across commercial, residential and hotel and leisure sectors.Since 2008, we''ve focused on creating safer buildings through: Mechanical and Electrical Smoke ControlPassive Fire ProtectionFire Engineering and Asset Management We''re a growing, ambitious SME with a strong operational culture and this role will be central to shaping