Our client, a leading contractor of water and wastewater treatment solutions – is seeking a Site Manager to join their team on a contract basis (Outside IR35) for a project in Horsham. Responsibilities: * Manage all site activities for water / wastewater / clean water / waste water treatment related projects. * Oversee mechanical, electrical, and instrumentation works (M&E / EICA) from installation through commissioning. * Coordinate direct labour and subcontractors, ensuring work is delivered to time, budget, and quality standards. * Prepare and monitor programme schedules; manage site planning and resource allocation. * Complete method statements, risk assessments (RAMS), safety documentation; ensure compliance with CDM, HSE, client, British and ISO standards. * Maintain site welfare, safety, and environmental compliance. * Liaise with the client, internal management, suppliers, subcontractors; represent the client on‑site. * Monitor quality and execution, conduct inspections, audits, deal with non‑conformances. * Keep accurate site records, reports, logs (daily site diaries, progress reports). * Manage change, ensure defective work is rectified; manage plant, tools, materials and ensure their readiness. Requirements: * Background in water / wastewater sector, or similar utilities / environmental infrastructure work. * Strong mechanical & electrical experience. Electrical background is a bi...