Commissioning Engineer - Critical Cooling

Job Description

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.\n\nThis 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.\n\nWhat You’ll Be Doing\n\nYou’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.\n\nWork 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.\n\nThis is a mobile, autonomous position where engineers are trusted to manage their own time and represent the business on complex project sites.\n\nWhat You’ll Need\n\nProven commissioning experience at sign-off level with chillers, AHUs and CRAC/CRAH systems\n\nStrong controls knowledge, including BACnet and Modbus\n\nPrevious data centre or critical cooling commissioning experience\n\nComfortable working independently on complex, live or near-live sites\n\nConfident producing commissioning documentation and leading client handovers\n\nFull UK driving licence\n\nWillingness to travel, including occasional European projects\n\nSalary, Earnings & Package\n\n£48,000 – £52,000 base salary (DOE), structured to deliver strong total annual earnings.\n\nThe package includes:\n\nDoor-to-door travel paid\n\nTime-and-a-half paid on all hours worked beyond 40 per week (including travel)\n\nConsistent, predictable overtime due to long-term project delivery\n\nPension contributions calculated on full earnings\n\nCompany vehicle with private use, laptop, tablet, tools and high-spec equipment\n\nPaid travel, accommodation and expenses\n\nOngoing OEM training on critical cooling systems and controls\n\nFor engineers comfortable with site-based project work, the structure delivers\n \n earnings well beyond the headline base\n \n , alongside stability and high-quality projects.\n\nWhat’s Next\n\nIf 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