A major contractor who operate as Principle contractor on Data Centres are seeking a CSA Quantity Surveyor for hyper scale Data Centres in East London. This QS role will be responsible for the commercial management of Civils, Structural and Architectural (CSA) The Quantity Surveyor will drive cost certainty and programme compliance, ensuring robust management of subcontractor valuations, variation pricing and measurement, and the demonstration of cost to client counterparts in a clear, auditable and contractually compliant manner. Own the preparation and submission of interim valuations, change assessments, and support negotiations with both subcontractors and clients, ensuring that entitlements are properly evidenced and secured. Essential Knowledge: · Strong technical understanding of Civils, Structural and Architectural elements including interfaces with other disciplines. · Good understanding of M&E services and coordination requirements. · Thorough knowledge of construction contracts (FIDIC, JCT or NEC), variation procedures, and entitlement mechanisms. · Proven ability to measure and substantiate variations and valuations. · Strong commercial acumen including cost forecasting, reporting and change control. · Excellent grasp of buildability and sequencing for CSA works. · Proficient in Microsoft Excel, Word and standard commercial tools. Essential Competencies: · Strong verbal and written communication skills — able to influence and challenge where required. · Analytical and detail-orientated with strong numerical reasoning. · Proactive, driven and solutions-focused approach to problem solving. · Organised and methodical — able to manage multiple packages and deadlines. · Ability to work independently and collaboratively within a multidisciplinary team. · Professional and confident when dealing with subcontractors, consultants and clients. · High level of contractual awareness and ability to substantiate assessments with clear audit trails. · Ability to support Project Managers in commercial and interface matters. · Positive and professional attitude — a self-starter with drive and ambition. · Adhere to Quality, HR and commercial policies and procedures · Competent with Microsoft Office and the general use of IT Equipment. On offer is a £60-80k salary plus package (based on experience)