Senior Project Manager Sewage Treatment Works Reports to: Project Director Project: Slough - Extension of an operational sewage treatment plant (STW) Location: First year in Central London, then in Slough. Role Summary We are seeking an experienced Senior Project Manager with a strong background in water/wastewater infrastructure to lead the extension of a live sewage treatment works that must maintain full operations throughout construction. The candidate will own end-to-end delivery (scope, programme, budget, quality, safety, environmental compliance) while ensuring a seamless coordination with Thames Water s operational team, strict adherence to Thames Water procedures and standards, and effective management of multidisciplinary engineering and delivery teams (civil, mechanical, electrical, chemical/process). Key Responsibilities: Lead the full project lifecycle from project initiation, design coordination, procurement, construction, commissioning, to handover/closeout. Plan and sequence the works to ensure a full coordination with the existing treatment processes, avoiding any unplanned outages, including a meticulously management of the isolations and live interfaces. Establish and maintain the Project Execution Plan, programme, cost plan, risk register, and change control in line with client and internal governance. Serve as the primary point of contact for Thames Water and their operational representatives; chair progress, risk, and interface meetings. Coordinate