A professional who tends series of vibrating screens that separate crushed ore or stone according to size. Respnsibilities include:

• Pushes controls to start screens vibrating and move ore on conveyors or belts.
• Pulls levers to discharge crushed ore from conveyor or chute onto vibrating screens.
• Clears screen holes clogged with oversize ore, using bar.
• Removes clogged screens, using wrenches, and cleans them with compressed air.
• May tend conveyor belts and process ore through crushers.
• May obtain ore samples, using mechanical sampler, hand sieve, or splitter.
• May tend screens that separate phosphate rock from matrix and be designated Feed-Preparation Operator.