Control and monitor biomass plant activities and perform maintenance as needed.

Monitor, operate, and maintain landfill gas collection system components and environmental monitoring and control systems.

Calculate, measure, load, mix, and process refined feedstock with additives in fermentation or reaction process vessels and monitor production process. They perform, and keep records of, plant maintenance, repairs, and safety inspections.

Operate or control petroleum refining or processing units. They specialize in controlling manifold and pumping systems, gauging or testing oil in storage tanks, or regulating the flow of oil into pipelines.

Distribute or process gas for utility companies and others by controlling compressors to maintain specified pressures on main pipelines.

Control or operate entire chemical processes or system of machines.

Operate or control an entire process or system of machines, often through the use of control boards, to transfer or treat water or wastewater.

Operate or maintain stationary engines, boilers, or other mechanical equipment to provide utilities for buildings or industrial processes. They operate equipment, such as steam engines, generators, motors, turbines, and steam boilers.

Control, operate, or maintain machinery to generate electric power. Includes auxiliary equipment operators.

Coordinate, regulate, or distribute electricity or steam.