Efficiency Ltd. is seeking a Senior HVAC Chiller, Service and Installation Technician to join their growing team. Efficiency Ltd. is the authorized distributor for MITSUBISHI mini-split systems, Variable Refrigerant Flow (VRF) DX systems, Variable Refrigerant Flow (VRF) chilled water systems. RESPONSIBILITIES INCLUDE: Install, commission, service, maintain, troubleshoot and repair air-cooled and water-cooled chillers with capacities up to 250 tons of refrigeration (250 TR). Troubleshoot and repair compressors, condensers, evaporators, expansion valves, pumps, refrigerant circuits, electronic controllers, sensors, safety devices and control panels. Perform chiller start-ups, operational testing, preventive maintenance, performance evaluations and system adjustments. Diagnose, install, commission, maintain and repair VRF systems, ductless split systems, multi-split systems, heat pumps, ventilation systems and commercial HVAC equipment. Troubleshoot chilled-water systems, circulation pumps, valves, flow switches and associated piping and controls. Perform equipment inspections, preventive maintenance and system performance assessments to ensure safe and efficient operation.