Principal Mechanical MEP Design Engineer Location: London Salary: £85,000 Progression: Associate / Director-level opportunities Lead mechanical design on challenging, bespoke projects within a growing London consultancy, with the opportunity to develop a team, influence project delivery and progress into senior leadership. We are working with a London-based building services consultancy looking to appoint a Principal Mechanical Design Engineer. This is an opportunity for an experienced engineer to take technical ownership of complex projects, support junior team members and play a key role in the continued development of the business. The Role * Lead mechanical building services design across a range of complex, one-off projects. * Take responsibility for projects from concept through to detailed design and delivery. * Provide technical leadership and oversee design quality. * Manage, mentor and develop engineers within the team. * Coordinate mechanical designs with electrical, structural and architectural disciplines. * Attend client meetings and develop strong working relationships. * Support project delivery, technical reviews and design coordination. * Contribute to the development of engineering standards and working practices. * Help drive the growth and technical capability of the consultancy. Requirements * Extensive experience in mechanical building services design. * Strong knowledge of HVAC, ventilation, heating and cooling systems. * Experience leading projects and taking ownership of technical delivery. * Ability to manage, mentor and support other engineers. * Strong understanding of relevant building services standards and regulations. * Confident working with clients and multidisciplinary project teams. * Experience delivering technically challenging or bespoke projects. * Degree-qualified in Mechanical Engineering or Building Services Engineering, or equivalent experience. * Chartered status, or working towards chartership, would be advantageous. The Opportunity * Salary of £85,000. * A clear progression route into Associate and potentially Director-level leadership. * The opportunity to lead and develop a small team. * Exposure to challenging, bespoke building services projects. * A senior role offering genuine influence over technical delivery and business development. Please note: Candidates must already have the right to work in the UK. Visa sponsorship cannot be offered