HVAC building engineer is responsible for the operation, maintenance, and repair of a building's heating, ventilation, and air conditioning (HVAC) systems, including tasks like inspecting equipment, performing preventative maintenance, troubleshooting malfunctions, coordinating with contractors for repairs, and ensuring compliance with safety and building codes, all while prioritizing the efficiency and comfort of the building's occupants; essentially acting as the primary caretaker of the building's climate control systems. Operates, maintains, monitors, and performs preventive, predictive, and corrective maintenance on all building HVAC and mechanical equipment, which may include: chillers, cooling towers, air handlers, roof top units, temperature control systems, building management systems, and digital systems.