Cut, grind, and polish eyeglasses, contact lenses, or other precision optical elements. They assemble and mount lenses into frames or process other optical elements. Includes precision lens polishers or grinders, centerer edgers, and lens mounters.

Operate or watch over heavyduty heating equipment. Includes activities, such as annealing glass, drying lumber, curing rubber, removing moisture or soap from the materials.

Set up, operate, or watch over machines, such as glass forming machines, plodder machines, and tuber machines. They shape and form products, such as glassware, food, rubber, soap, brick, tile, clay, wax, tobacco, or cosmetics.

Set up, operate, or watch over machines that cut or slice materials, such as glass, stone, cork, rubber, tobacco, food, paper, or insulating material.

Set up, operate, or watch over machines to mix or blend materials, such as chemicals, tobacco, liquids, color pigments, or explosive ingredients.

Grind, sand, or polish, using hand tools or hand held power tools, a variety of metal, wood, stone, clay, plastic, or glass objects. Includes chippers, buffers, and finishers.

Set up, operate, or watch over machines to crush, grind, or polish materials, such as coal, glass, grain, stone, food, or rubber.

Set up, operate, or watch over continuous flow or vat type equipment; filter presses; shaker screens; centrifuges; condenser tubes; precipitating, fermenting, or evaporating tanks; scrubbing towers; or batch stills. These machines extract, sort, or separate liquids, gases, or solids from other materials to recover a refined product. Includes dairy processing equipment operators.

Operate or watch over equipment to control chemical changes or reactions in the processing of industrial or consumer products. Their equipment used includes devulcanizers, steam jacketed kettles, and reactor vessels.

Monitor and control activities associated with hydropower generation. They operate plant equipment, such as turbines, pumps, valves, gates, fans, electric control boards, and battery banks. They monitor equipment operation and performance and make necessary adjustments to ensure optimal performance. They perform equipment maintenance and repair as necessary.