Senior Mechanical Engineer – Wastewater Non‑Infrastructure Projects Step into a role where your engineering expertise directly protects the environment, strengthens local communities, and shapes the future of wastewater treatment across the Thames Valley. As a Senior Mechanical Engineer within our Thames Valley Delivery Office, you’ll play a leading role in modernising our wastewater treatment plants — from early design thinking through to construction and commissioning. You’ll work closely with a wide range of specialists, champion safe and sustainable design, and bring forward innovative solutions that improve life for millions of people. This is an opportunity to apply your technical strengths while influencing real change across a major utility — in a team that values collaboration, diverse perspectives and continuous professional growth. What you’ll be doing as a Senior Mechanical Engineer * Leading mechanical design development across multiple wastewater treatment projects — from concept and feasibility through to contract award. * Shaping clear and robust project briefs from a mechanical engineering standpoint. * Identifying risks and opportunities to support accurate pricing and scope definition. * Reviewing surveys, drawings and contractor proposals before construction begins. * Providing design assurance throughout detailed design and construction phases....