Data Centre Mechanical Engineer - Chillers & AHUs (Onsite)

Apex Systems US; Greater London; On-site; GBP 60,000 - 78,000; Full time

Job summary

Apex Systems US is seeking a mechanically-biased Engineering Operations Technician for our London data centre portfolio. You will work on mechanical cooling, water systems, AHUs, chillers, cooling towers and water treatment, supporting 24/7 operations.

The role requires hands-on maintenance, testing, and documentation within a safety-conscious environment, with flexible scheduling including nights and weekends.

Qualifications

• Must have data centre background and hands-on mechanical skills.
• Experience with pressurized water systems, pipework installations and fluid distribution networks.
• Knowledge of ACOP L8 and HSG274 water treatment guidance and compliant regimes.
• Ability to read and interpret procedures, technical documents and engineering drawings.

Responsibilities

• Install, maintain, repair pipework, fittings, valves and manifolds across cooling loops.
• Operate and maintain AHUs, chillers, cooling towers and water systems.
• Conduct pressure testing, leak detection, and system integrity checks on water circuits.
• Manage water treatment programs per ACOP L8/HSG274.
• Monitor pumps, heat exchangers and CDUs; troubleshoot mechanical assets.
• Support commissioning/decommissioning of mechanical cooling infrastructure.

Skills

Data centre background

Pressurized water systems

HVAC systems knowledge

Procedures & drawings reading

Water treatment programs

BMS/SCADA integration

Safety & LOTO

Education

NVQ Level 3 in Mechanical/Electrical/Mechatronics or NFQ Level 3

Tools

EPMS/SCADA/BMS

CDUs / rear-door heat exchangers

Job description

Apex Systems US is seeking a mechanically-biased Engineering Operations Technician for our London data centre portfolio. You will work on mechanical cooling, water systems, AHUs, chillers, cooling towers and water treatment, supporting 24/7 operations.

The role requires hands-on maintenance, testing, and documentation within a safety-conscious environment, with flexible scheduling including nights and weekends.