International Union of Operating Engineers
Local 99, 99-A, 99-C, 99-O, AFL-CIO

Local 99 members operate and maintain automated or computerized control systems, stationary engines, and auxiliary equipment such as boilers, generators, pollution control devices, and other equipment which provides heat, ventilation, light, and power for buildings, industrial plants, and other work sites. Their job responsibilities also include monitoring and inspection of plant equipment, alarms, meters, and other instruments to measure temperature, pressure and fuel flow, to detect leaks or other equipment malfunctions and to ensure plant equipment is operating at maximum efficiency.

Our members are skilled at working with owners, property managers, and building occupants, and they take seriously the responsibility of ensuring that the heating, ventilation, and safety systems work in a safe, effective, and efficient manner. Ultimately, our members are often the only people at a facility who have the knowledge of how these systems work.