Principal Mechanical Engineer – Water Leading Engineering Consultancy | Water Sector | Hybrid Working | Long-term Contract | Outside IR35 | Competitive Rate The Opportunity We're recruiting a Principal Mechanical Engineer to deliver high-quality mechanical engineering design and technical leadership across multiple water sector projects. You'll be responsible for leading mechanical engineering workstreams, ensuring compliance with sector standards, managing design delivery, and mentoring engineering teams. Contract Details: Outside IR35 | Competitive daily/monthly rate | Hybrid working| Long-term contract MUST HAVE: Current water sector experience. This is a senior technical role for an SQEP (Suitably Qualified Experienced Person) mechanical engineer with proven, recent expertise in water, wastewater or biosolids treatment. You'll have the capability to lead mechanical engineering on projects or groups of projects, managing design quality, timescales, cost and compliance. You'll work collaboratively across disciplines, liaising with clients and partners to ensure integrated delivery. What You'll Be Doing Mechanical Engineering Design & Delivery Lead mechanical engineering workstreams on water sector projects Produce and approve mechanical design deliverables including: Process Flow Diagrams and Plant Layouts Equipment Specifications and Datasheets Pumping system calculations Material requisiti...