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Principal Mechanical Design Engineer

Job in City of Westminster, Central London, Greater London, England, UK
Listing for: 12 Recruitment Ltd
Full Time position
Listed on 2026-10-18
Job specializations:
  • Engineering
    Mechanical Engineer, Building Services Engineer
Salary/Wage Range or Industry Benchmark: 85000 GBP Yearly GBP 85000.00 YEAR
Job Description & How to Apply Below
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

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