12-hour rotating shifts Location: Slough Data Centre Shift Pattern: Continental shifts, 12-hour rotation, 24/7/365 operation Reports to: Critical Facilities Manager Lead Liquid Cooling Engineer The Role We are looking for an experienced Shift Mechanical Engineer to operate, maintain and support the liquid cooling systems within a live data centre. The role focuses on Coolant Distribution Units (CDUs) and secondary-side cooling infrastructure supporting high-density AI and high-performance computing (HPC) environments. You will be responsible for maintaining cooling performance, responding to faults and ensuring the data centre operates safely and without disruption. Key Responsibilities Monitor and maintain CDUs, pumps, pipework, heat exchangers, valves, filtration and leak detection systems. Monitor temperatures, pressures, flow rates and water quality through BMS, DCIM and local controls. Carry out planned preventative maintenance (PPM), inspections and mechanical servicing. Diagnose and respond to cooling faults, leaks, pump failures and system alarms. Carry out water sampling, testing and support chemical treatment. Follow emergency procedures to restore cooling and protect critical IT equipment. Complete shift handovers, maintenance records, permits and incident reports. Work in accordance with RAMS, MOPs, SOPs, EOPs and safe isolation procedures. Supervise specialist contractors and OEM engineers, supporting commissioning, fault investigations and ..... full job details .....