Jobs, fresher vacancy - Principal Mechanical Engineer (Data Centre) • UK

Company: Calibre Search

UK

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.