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

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.

Operate or control nuclear reactors. They move control rods, start and stop equipment, monitor and adjust controls, and record data in logs. They implement emergency procedures when needed. They respond to abnormalities, determine cause, and recommend corrective action.

Set up, operate, or watch over woodworking machines, such as drill presses, lathes, shapers, routers, sanders, planers, and wood nailing machines. They operate cnc equipment.