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Principal Mechanical Engineer

Job in London, Greater London, W1B, England, UK
Listing for: Eligo Recruitment Ltd
Full Time position
Listed on 2026-03-05
Job specializations:
  • Engineering
    Mechanical Engineer, Engineering Design & Technologists, Electrical Engineering
Job Description & How to Apply Below
Position: Principal Mechanical Engineer (Permanent)
Principal Mechanical Engineer
Data Centres & Mission Critical | London
Mission Critical Design | Data Centre MEP | Mechanical Engineering Consultancy | Senior Mechanical Engineer Jobs

The infrastructure powering the digital world is expanding fast — and the mechanical engineering behind it has never been more sophisticated. Ready to work at the
forefront of it?

Our client is a highly regarded UK engineering consultancy with a specialist Mission Critical & Data Centres team.

They're seeking a Principal or Associate Mechanical Engineer to take a senior, client-facing role on complex projects spanning the UK, Ireland and Europe — from data halls and close control environments to live plant upgrades and critical facilities
reviews.

What the role involves:
 Leading day-to-day mechanical design delivery on data centre and mission critical projects, from strategic concept through to completion
 Developing innovative design solutions that meet client requirements and regulatory standards
 Acting as a key client contact — attending project meetings, managing stakeholder relationships and coordinating across disciplines
 Supporting project fee management and resource planning alongside the project leader
 Mentoring graduates and apprentices, actively contributing to team development

What they're looking for:
 Solid mechanical engineering experience with a proven track record on data centre or mission critical projects
 Proficiency with Revit, BIM and/or AutoCAD in a design delivery context
 Background in consultancy or a design-led environment, with confidence handling client and contractor relationships
 A collaborative, generous approach to working with and developing others

What's on offer:
 9-day fortnight working pattern
 Up to 30 days annual leave
 Private medical cover
 EV salary sacrifice scheme + stock options
 Inclusive, flexible culture with strong investment in professional growth

This is an outstanding opportunity for a senior mechanical engineer to take real ownership of high-complexity work in one of the most dynamic sectors in the built
environment.

Want to know more? Get in touch.

Eligo Recruitment is acting as an Employment Business in relation to this vacancy. Eligo is proud to be an equal opportunity employer dedicated to fostering diversity and creating an inclusive and equitable environment for employees and applicants. We actively celebrate and embrace differences, including but not limited to race, colour, religion, sex, sexual orientation, gender identity, national origin, veteran status, and disability.

We encourage applications from individuals of all backgrounds and experiences and all will be considered for employment without discrimination. At Eligo Recruitment diversity, equity and inclusion is integral to achieving our mission to ensure every workplace reflects the richness of human diversity
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