Senior / Lead Mechanical Design Engineer City of London | Hybrid Working | Up to £70k Design & Build | Commercial Fit-Out | Leadership Opportunity We're working with a fast-growing Design & Build contractor delivering high-quality M&E 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 & CAT B space. They're now looking for a Senior Mechanical Design Engineer to take ownership of mechanical design and play a pivotal role in shaping their in-house M&E 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 M&E design department What They're Looking For Strong background in mechanical building services design Proven experience delivering CAT A & CAT B office fit-out projects Comfortable working in a fast-paced Design & Build env...