Shift Mechanical Engineer - Data Centre (Liquid Cooling)

Job DescriptionShift Mechanical Engineer – Data Centre (Liquid Cooling) Salary/Rate £50000 - £60000/annum +Package Location Slough, Berkshire Posted Just now Company DT Source Limited Description 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 system improvements. Essential Qualifications & Experience * Experience working in mission-critical facilities and data centre cooling environments. * Strong knowledge of chilled water and closed-loop cooling systems. * Experience maintaining pumps, valves, actuators, heat exchangers and filtration systems. * Knowledge of water treatment, leak detection and water quality management. * Experience using BMS systems for monitoring, alarms and fault diagnosis. * Understanding of Permit-to-Work systems and safe working procedures. * Experience responding to mechanical emergencies in live operational environments. Desirable Experience * Direct-to-chip liquid cooling and CDU systems. * AI and high-performance computing (HPC) data centres. * Liquid cooling equipment from Schneider, Vertiv, CoolIT, Motivair, Stulz or equivalent. * Experience in Tier III or Tier IV data centres. * Critical Facilities Management and 24/7 engineering operations. Key Skills The successful candidate will be confident fault-finding on mechanical cooling systems, able to respond effectively to critical incidents and comfortable working independently as part of a rotating shift team. Good communication, accurate reporting and a strong understanding of health and safety are essential. To apply, please send CV ASAP for immediate response