Principal Mechanical Design Engineer – Building Services

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.

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.

• 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

• 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

• 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

• 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