Senior Mechanical Design Engineer - Water and Wastewater Infrastructure Are you a Senior Mechanical Design Engineer with proven UK water/wastewater experience? Join a growing multidisciplinary team delivering treatment and network infrastructure projects across the South. The Role You''ll lead mechanical design delivery from feasibility and outline design through to detailed design and construction/commissioning support. You''ll own design packages, review technical outputs and coach engineers to ensure safe, compliant, buildable solutions. Key Responsibilities Lead mechanical design for treatment plants, pumping stations, pipelines and associated assets Produce/review calculations, specifications, schedules and technical documentation Review and approve work from engineers and CAD designers Develop solutions for pumps, pipework, valves, rotating equipment and process plant Coordinate with civil, process and EICA teams to deliver integrated designs Lead/support client meetings, design reviews and technical workshops Ensure compliance with BS EN, WIMES, DSEAR, Eurocodes and relevant UK regulations Support site visits, inspections and commissioning across the South (occasional nationwide travel) Mentor junior engineers and drive continuous improvement within the mechanical discipline About You 7+ years'' mechanical design experience in UK water/wastewater projects Degree in Mechanical Engineering (or similar); CEng or working towards desirable Strong knowledge of