Bureau Technical Services (BTS) is seeking a Mechanical Commissioning Engineer to join a major data centre project in Zaragoza. This position will support the planning, scheduling, coordination and execution of full lifecycle commissioning activities across critical data centre facilities. It will also involve participation in the MEP design process, witnessing static and dynamic testing of complex mechanical and control systems, and supporting systems through normal operation, maintenance and failure mode testing. Key responsibilities: Support the full commissioning lifecycle across mission critical facilities Participate in the MEP design and commissioning process Witness and support static and dynamic testing of complex mechanical and control systems Assist with operating systems in normal, maintenance and failure modes Carry out commissioning, testing, troubleshooting and maintenance of heavy mechanical systems and subsystems Requirements: Degree in Mechanical Engineering or equivalent practical experience Experience in installation, commissioning, testing, troubleshooting and maintenance of mechanical control systems Strong HVAC and cooling systems experience Knowledge of large-scale data centre mechanical infrastructure Hands-on experience with chillers, cooling towers and associated subsystems Experience with AHUs, fan coil units, process water systems and humidification Knowledge of BMS, PLC, SCADA or other control and instrumentation systems Ability to interpret raw signal data such as temperature and humidity data Experience within mission critical facilities 3+ years of commissioning experience 3+ years of data centre experience Right to work in the location required