Senior Mechanical Engineer

Role

Senior Mechanical Engineer (SME)

Major UK data centre programme involving modifications to existing facilities to support AI workloads.

Salary: Competitive hourly rate

Engagement: Contract

Work Pattern: Hybrid role (three days in office)

Start Date: ASAP

Responsibilities

• Lead mechanical engineering activities for facility upgrades designed to support AI compute loads.
• Develop and optimise liquid cooling systems to manage increased thermal output from high-density racks.
• Assess existing mechanical infrastructure and define upgrade paths for chilled water systems, heat rejection equipment, and distribution networks.
• Produce and review mechanical calculations, specifications, drawings, and technical documentation.
• Coordinate with electrical, HVAC, BMS, fire safety and architectural teams to ensure seamless integration of upgraded systems.
• Support commissioning, testing and performance validation of new cooling solutions.
• Act as a subject-matter expert throughout the project lifecycle, advising on mechanical resilience and efficiency.

Requirements

• Degree in Mechanical Engineering or Building Services Engineering.
• Strong experience with high-density cooling in mission-critical environments, ideally data centres.
• Background in retrofit or upgrade projects involving chilled water, liquid cooling, or advanced thermal management.
• Ability to collaborate across multiple technical disciplines and manage interfaces.
• Experience producing and reviewing technical documentation and leading mechanical packages independently.
• Strong communication skills and confidence in client-facing environments.

What’s on offer

• Hybrid working (3 days in London office).
• Opportunity to work on cutting-edge AI-driven data centre upgrades.
• Progression into senior technical leadership roles.
• A highly specialised, engineering-driven environment.