Job Search

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:

Large-scale urban redevelopment scheme within a key central London regeneration zone, involving multiple mixed-use assetsOver-site development above major transport infrastructure in a prime central London locationHigh-profile commercial development at a major central London addressSignificant works at a nationally recognised cultural institution involving sensitive refurbishment and infrastructure upgradeMajor capital programme within a leading UK higher education campus involving phased redevelopment and expansion worksHyperscale 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 projectsManage 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 consultantsSupport delivery of mission-critical and large-scale infrastructure environmentsEnsure compliance with relevant UK regulations, standards, and client requirementsContribute to design optimisation, value engineering, and technical innovation

Package

Circa £70,000 basic salaryCar allowanceAll travel expenses coveredStrong forward workload (2+ years secured pipeline)Exposure to landmark UK developments and major infrastructure schemesLong-term progression within a growing and stable design team

About You

Mechanical Engineer with strong building services design experienceProven experience delivering projects through RIBA Stages 1-5Background in consultancy or contractor design environmentExperience working on large-scale commercial, infrastructure, or mission-critical projectsData centre experience highly advantageousStrong 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.

Read less