We re looking for a Principal Mechanical Engineer to lead the mechanical design of water and wastewater treatment projects, ensuring innovative, cost-effective, and safety-compliant solutions.You ll collaborate across disciplines, support project bids, mentor junior staff, and help drive continuous improvement in design practices. This is a great opportunity to make a real impact in a high-performing, forward-thinking environment.What we re looking for: Degree-qualified Mechanical Engineer (Chartered or working toward) Strong understanding of water/sewage treatment systems Experience managing design teams Skilled in layout optimisation and design coordination Strong communicator and problem solver Full UK driving license Only those with proof of right to work in the UK should apply for this role. Apply today or get in touch with (url removed) for more information. ..... full job details .....