Building Systems Diagnostics Technicians identify faults in HVAC, electrical, plumbing, and automation systems using diagnostic tools, sensors, and monitoring systems. They analyze system performance data and perform troubleshooting to resolve issues. Responsibilities include fault detection, testing, analysis, and reporting. Work environments include commercial buildings and industrial facilities. They follow safety standards and diagnostic protocols. Their role ensures efficient system performance, reduces downtime, and supports maintenance operations, making them essential in advanced facility management and smart building systems globally.