A Heat Exchanger job typically involves the design, manufacturing, maintenance, or operation of heat exchangers, which are devices used to transfer heat between fluids without mixing them. Professionals in this field may work in industries such as HVAC, power plants, chemical processing, or manufacturing. Responsibilities can include system installation, troubleshooting, efficiency optimization, and ensuring compliance with safety standards. Depending on the role, individuals may need expertise in mechanical engineering, thermodynamics, and materials science.