HVACR technicians install, maintain, and repair indoor air quality systems, such as air conditioners.

Industrial machinery mechanics adjust and calibrate equipment, as well as maintain and repair factory equipment and other industrial machinery, such as conveying systems, production machinery, and packaging equipment.

Maintenance managers supervise the repair and maintenance of buildings and installed mechanical equipment, as well as ensure timely installation and upkeep of the company's property and systems like elevators in order to ensure operational effectiveness.