Head of Design at a Growing Design and Build MandE Contractor Seeking Principal / Associate Mechanical Design Engineer Up to 80k 5% Bonus + Commission Travel Paid Hybrid Working City of London We''re working with a fast-growing Design and Build contractor delivering high-quality MandE solutions across commercial office fit-out projects. Established just 5 years ago, the business is already turning over 7-8m and building a strong reputation in the CAT A and CAT B space. They''re now looking for a Principal or Associate Mechanical Design Engineer to take ownership of mechanical design and play a pivotal role in shaping their in-house MandE design capability. The Opportunity This is more than just a senior engineer role - it''s a chance to build and lead a design function within a growing contractor. You''ll be the go-to technical authority, working closely with project teams and clients to deliver practical, buildable solutions. You''ll: Lead the mechanical design delivery across multiple fit-out projects Act as the technical lead, troubleshooting and driving engineering quality Take ownership of client engagement and design coordination Manage and mentor a small team of engineers (with plans to grow) Help shape and scale the MandE design department Take an active role in developing new business What They''re Looking For Strong background in mechanical building services design Proven experience delivering CAT A and CAT B office fit-out projects Comfortable ..... full job details .....