Senior Mechanical Design Engineer - Water & 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 Youll lead mechanical design delivery from feasibility and outline design through to detailed design and construction/commissioning support. Youll 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 mechanical systems used in treatment and network infrastructure Confident using AutoCAD and mechanical design/modelling tools (Revit advantageous) Solid understanding of H&S and regulatory compliance in a regulated environment Able to manage workload, prioritise and deliver design packages to time/cost/quality Clear communicator, comfortable presenting and defending design decisions Working Pattern A mix of office-based, hybrid and site work with travel across the South of England and occasional nationwide projects. Whats on Offer Salary up to £75,000 depending on experience 25 days annual leave plus bank holidays Pension scheme Discretionary bonus Private healthcare Death in Service benefit Hybrid working Apply If youre a Senior Mechanical Design Engineer looking to lead high-impact water infrastructure projects, wed welcome your application.