Pure Engineering Group are seeking an experienced Commissioning Engineer with strong controls expertise and hands-on experience in AC systems, BACnet, and Modbus. The role involves commissioning, testing, and optimising building management and control systems to ensure reliable and efficient operation. Key Responsibilities Commissioning and functional testing of control systems and associated AC/HVAC equipement Configuration, testing, and troubleshooting of BACnet and Modbus communications Verification of control strategies, sequences of operation, and system performance Integration of field devices, controllers, and BMS front ends Fault finding across software, controls, networks, and field devices Support site acceptance testing (SAT) and handover documentation Liaise with project managers, contractors, and clients during commissioning phases Produce commissioning reports, test scripts, and as-built documentation Required Experience & Skills Proven experience as a Commissioning Engineer (controls / BMS / automation) Strong understanding of AC/HVAC systems Hands-on experience with BACnet and Modbus (RTU & TCP/IP) Ability to read and interpret control schematics and wiring diagrams Experience with BMS platforms (e.g. Siemens, Trend, Honeywell, Schneider, Tridium, etc.) Strong troubleshooting and problem-solving skills Comfortable working on live sites and during commissioning phases Desirable Experience with integration to third-party systems Knowledge of IP networking and control panels Previous data centre, pharmaceutical, or large commercial project experience Relevant engineering or technical qualification Skills: Air Conditioning Refrigeration Controls BACnet Modbus