CIBSE Journal CPD
Principal Mechanical Design Engineer – Building Services
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Principal Mechanical Design Engineer - Building Services
Employer: Eden Brown
Location: London
Salary: 70,000 - 80,000 GBP Annual + Car Allowance + All Travel Covered
Closing date: 1 Sep 2026
Job Details
Specialist area: Mechanical engineering
Function: Engineer
Contract Type: Permanent
Hours: Full Time
Role Overview
Principal Mechanical Design Engineer
London: 70,000 + Car Allowance + Travel Paid
Major Projects: Building Services
A leading MEP contractor is seeking a Principal Mechanical Design Engineer to join a well-established and growing electrical design team in London. This is a senior technical appointment within a delivery-focused, contractor-led environment operating across some of the UK's most complex building services projects.
The design team consists of approximately 25 engineers, supported by a strong secured pipeline of work providing at least two years of forward workload visibility.
The Opportunity
You will take a leading role in delivering electrical design across multiple high-value projects through RIBA Stages 1–5, combining technical leadership, coordination, and hands-on design oversight.
The current workload includes a major hyperscale data centre development (400m+ core project value), forming a flagship scheme within the business, alongside a strong portfolio of complex commercial, institutional, and mixed-use developments across London.
Live And Upcoming Project Portfolio Includes
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- Large-scale urban redevelopment scheme within a key central London regeneration zone, involving multiple mixed-use assets
- Over-site development above major transport infrastructure in a prime central London location
- High-profile commercial development at a major central London address
- Significant works at a nationally recognised cultural institution involving sensitive refurbishment and infrastructure upgrade
- Major capital programme within a leading UK higher education campus involving phased redevelopment and expansion works
- Hyperscale data centre programme with mission-critical electrical infrastructure and high resilience requirements
This is a highly design-led contractor environment where engineers are trusted with real ownership, technical responsibility, and direct client engagement.
Key Responsibilities
- Lead Mechanical design delivery across multiple concurrent major projects
- Manage design development from early concept through detailed design and construction stages (RIBA 1–5)
- Provide technical leadership, mentoring
- Coordinate with internal disciplines, clients, and external consultants
- Support delivery of mission-critical and large-scale infrastructure environments
- Ensure compliance with relevant UK regulations, standards, and client requirements
- Contribute to design optimisation, value engineering, and technical innovation
Package
- Circa 70,000 basic salary
- Car allowance
- All travel expenses covered
- Strong forward workload (2+ years secured pipeline)
- Exposure to landmark UK developments and major infrastructure schemes
- Long-term progression within a growing and stable design team
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About You
- Mechanical Engineer with strong building services design experience
- Proven experience delivering projects through RIBA Stages 1–5
- Background in consultancy or contractor design environment
- Experience working on large-scale commercial, infrastructure, or mission-critical projects
- Data centre experience highly advantageous
- Strong leadership, coordination, and stakeholder management skills
Why Apply?
This is an opportunity to join a stable and expanding design function delivering some of the UK's most technically challenging and high-value projects, including a significant presence in the data centre and major infrastructure sector. You'll have autonomy, responsibility, and the chance to influence design delivery at a senior level across a secure long-term pipeline.
Eden Brown is acting as an Employment Agency in relation to this vacancy.
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