Senior Data Centre Mechanical Engineer (Mechanical Engineer / Critical Facilities Engineer / HVAC & Cooling Systems SME)

Location: London (UK), Paris or Frankfurt (Europe) (Travel Across European sites) Salary: Circa £90,000 basic + Bonus & Excellent Benefits package (Flexible depending on salary & experience)

The Opportunity

Our client, a leading global data centre developer is seeking a Senior Data Centre Mechanical Engineer to join its expanding European Construction team. This is a senior, high-impact role where you will act as the Mechanical Subject Matter Expert (SME) across major hyperscale projects, delivering resilient, energy-efficient, and scalable mechanical systems for mission-critical data centre facilities.

The Role

As Senior Data Centre Mechanical Engineer / Mechanical SME, you will:

Lead design, installation, testing, and commissioning of mechanical systems for hyperscale data centres. Oversee systems such as HVAC, chillers, cooling towers, air-handling units (AHUs), fire suppression, and fuel delivery systems. Provide technical leadership, acting as the Mechanical SME, ensuring compliance with safety, reliability, energy efficiency, and operational standards. Conduct design reviews, factory witness testing, and commissioning oversight to validate critical equipment performance. Advise on redundancy, maintainability, and scalable mechanical infrastructure solutions. Act as a trusted advisor to contra...