Senior - Principal Mechanical Design Engineer City of London | 9 Day Fortnight | Hybrid Working | Up to £70k Are you looking for a role where you can lead projects, develop client relationships, and play a key role in shaping a growing team? This is an opportunity to join a forward-thinking building services consultancy with a reputation for delivering high-quality, sustainable engineering solutions across a diverse range of sectors including commercial, residential, education, healthcare, science & research, and heritage. With a strong pipeline of work and ambitious growth plans, they are looking to appoint a Senior or Principal Mechanical Engineer to strengthen their London team. The Opportunity This role offers the perfect balance of technical delivery, client engagement, and leadership responsibility. You'll be trusted to lead projects from concept through to completion, work closely with clients and design teams, and support the development of junior engineers while helping drive the continued success of the business. Whether you're an experienced Principal Engineer or a Senior Engineer looking to take the next step, this role offers a clear pathway into senior leadership. Key Responsibilities Lead the mechanical design delivery across a variety of building services projects Develop innovative and practical HVAC solutions from concept through to detailed design Manage project programmes, resources, ...