A leading engineering consultancy is seeking a Principal Design Engineer to lead the design and technical delivery of major water treatment projects. The role offers flexibility in office location and the opportunity to work either on a contract basis (inside IR35) or as a permanent employee. Ideal candidates should have proven experience in water sector engineering, with strong communication skills and the ability to oversee complex projects. Competitive day rates or permanent employment options are available. #J-18808-Ljbffr