Job Description:

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, and technical deliverables
• Act as a key point of contact for clients, architects, contractors, and wider project teams
• Undertake design reviews and ensure technical excellence across projects
• Mentor and support junior engineers, helping to develop the team's technical capability
• Support business development activities and contribute to strengthening existing client relationships
• Collaborate with sustainability, building physics, and electrical engineering teams to deliver integrated design solutions

What We're Looking For

• Experience in mechanical building services design within a consultancy environment
• Strong technical knowledge of HVAC systems, building regulations, and industry best practice
• Proven experience delivering projects across sectors such as commercial, residential, education, healthcare, science & research, or mixed-use developments
• Experience leading projects and managing client relationships
• Ability to mentor and develop engineers within a project team
• Chartered status or working towards chartership would be advantageous
• Strong communication and stakeholder management skills

Why Join?

• 9-day fortnight, giving you every other Friday off
• Enhanced employer pension contribution
• Clear progression pathway to Associate and Director level
• Strong investment in professional development and chartership support
• Opportunity to work on a diverse portfolio of technically challenging projects
• Collaborative, people-focused culture with genuine flexibility
• Growing business where you can have a visible impact on projects, clients, and the wider team

This is an excellent opportunity for a motivated Mechanical Engineer who wants to combine technical excellence with leadership, client engagement, and long-term career progression within a supportive and ambitious consultancy.

Whether you're working in the larger corporate companies or a small SME this is certainly one to take note of. Please don't hesitate to apply or get in touch for further info on the email below, we can arrange a confidential conversation anytime to suit you.

Your expert recruitment consultant is Lakshman Sivanesan, reachable via (url removed). Eden Brown is committed to equality in the workplace and is an equal opportunity employer.

Eden Brown is acting as an Employment Agency in relation to this vacancy.