CBRE Government & Defense - Tinker Air Force Base - Responsibilities: Installs, services and repairs environmental-control systems; utilizing knowledge of refrigeration theory, pipefitting and structural layout; Mounts compressor and condenser units on platform or floor, using hand tools, following blueprints or engineering specifications; Fabricates, assembles and installs ductwork and chassis parts, using portable metalworking tools and welding equipment; Installs evaporator unit in chassis or in air-duct system, using hand tools; Tests joints and connections for gas leaks, using gauges or soap and water solution