Inspects, troubleshoots, repairs and maintains machinery, electrical and mechanical equipment in accordance with diagrams, sketches, operation manuals, and manufacturer's specifications, using hand and power tools and precision measuring and testing instruments. Performs, directs and inspects for code and regulation compliance, all HVAC & R and BAS installations, work order, change orders, emergency repairs and other HVAC & R and BAS maintenance to facility HVAC & R systems.