Commissioning Engineer - Critical Cooling

We’re recruiting a Commissioning Engineer to join a specialist OEM team delivering large-scale data centre and critical cooling projects across the UK, with occasional European project support.

This is a commissioning-led role, not service. You’ll take ownership of complex cooling systems from first power-up through to final sign-off on high-value, mission-critical sites.

What You’ll Be Doing

You’ll lead the commissioning of full data centre cooling infrastructure, including chillers, AHUs, CRAC/CRAH units and fan wall systems. The role covers functional testing, optimisation, controls integration, documentation and client handovers.

Work is predominantly UK-based (London and South East heavy), with planned project travel rather than reactive call-outs. You’ll work closely with advanced controls platforms including BACnet and Modbus, supporting integration with site BMS systems.

This is a mobile, autonomous position where engineers are trusted to manage their own time and represent the business on complex project sites.

What You’ll Need

Proven commissioning experience at sign-off level with chillers, AHUs and CRAC/CRAH systems

Strong controls knowledge, including BACnet and Modbus

Previous data centre or critical cooling commissioning experience

Comfortable working independently on complex, live or near-live sites

Confident producing commissioning documentation and leading client handovers

Full UK driving licence

Willingness to travel, including occasional European projects

Salary, Earnings & Package

£48,000 – £52,000 base salary (DOE), structured to deliver strong total annual earnings.

The package includes:

Door-to-door travel paid

Time-and-a-half paid on all hours worked beyond 40 per week (including travel)

Consistent, predictable overtime due to long-term project delivery

Pension contributions calculated on full earnings

Company vehicle with private use, laptop, tablet, tools and high-spec equipment

Paid travel, accommodation and expenses

Ongoing OEM training on critical cooling systems and controls

For engineers comfortable with site-based project work, the structure delivers

earnings well beyond the headline base

, alongside stability and high-quality projects.

What’s Next

If you’re a commissioning engineer looking to work on serious infrastructure with paid travel, consistent overtime and a business that values technical competence, get in touch for a confidential conversation or send over your CV to find out more