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Principal Electrical Engineer - Data Centres
Up to 70,000 + Benefits
Central London Flexible Hybrid
An established UK engineering consultancy-independent for over 70 years- is expanding its specialist Data Centre team and is seeking a Principal Mechanical Engineer with strong technical design experience. This is an opportunity to join a respected, people-centric business with an average staff tenure of 12 years, a genuine open-door culture, and a commitment to continuous progression without rigid promotion cycles.
Why Join?
A genuinely supportive culture
No annual reviews or fixed pay-rise cycles - promotions and salary increases happen as soon as they're earned.
"No stupid questions" philosophy - learning is encouraged and supported.
Highly selective hiring focused on technical excellence, ensuring you work alongside capable, high-quality engineers.
Flexible hybrid working: 2 days in the office (Tue/Thu typically; 3 days initially for onboarding and collaboration).
Long-standing leadership that trusts its engineers and provides autonomy.
Strong Benefits Package
25 days holiday + Christmas shutdown (rising to 28 after 6 years)
Contributory private healthcare
Standard pension
EAP including financial & legal support
Annual wellbeing day: a full team day out (walks, tours, social events)
Chartered Engineer mentorship available (including from a recognised CIBSE Data Centre leader)
About the Data Centre Team
The London-based Data Centre group consists of a core team of five permanent engineers, supported by contractors when needed. The team is led by senior Electrical and Mechanical leads, with a strategic plan to continue growing a central London hub before expanding expertise across other UK offices.
The practice has made a deliberate and successful push into the data centre sector over the last two years, securing work with major global operators (hyperscalers and colocation providers). While most work is UK-based, they are now being asked to support clients on European projects.
Project & Technical Exposure
You will work on both design and technical advisory projects, including:
Strategic asset replacement programmes
New build data centres up to 100MW
Reviewing and upgrading live MEP systems in operational facilities
Compliance monitoring
Detailed Mechanical design, specifications and scopes of work
This role is hands-on and design-focused - not a project management position (although PM skills can be developed).
What They're Looking For
Senior or Principal-level Mechanical Engineer with strong data centre design experience
Solid understanding of critical Mechanical infrastructure and MEP integration
Capable of delivering high-quality technical work and contributing to client-facing advisory tasks
Someone who values autonomy, collaboration, and technical excellence
UK-based, able to attend the London office twice weekly
The consultancy does not use salary bandings and pays based on technical capability - up to 75k is realistic for a strong Principal.
If you're an Mechnically biased Data Centre specialist looking for a technically engaging role within a supportive, low-ego engineering environment, this position offers long-term growth, high-profile project exposure, and the chance to help shape a growing specialist team.
Calibre Search promote equality in the workplace and we welcome applications from all suitably skilled or qualified candidates regardless of their sex, race, disability, religion/beliefs, sexual orientation or age. We act as both an employment agency and employment business.
