A professional who tends crushing machine that crushes and washes cullet (waste glass) for use in manufacturing glass. Respnsibilities include:

• Starts conveyor that transfers cullet from storage to crushing machine.
• Starts machine and observes its operation to determine whether cullet is ground to specified fineness.
• Starts water spray to wash crushed cullet.
• Inspects crushed cullet for foreign matter such as stones, bottle caps and neck rings.
• Directs flow of crushed cullet to specified bins by color and type of glass.
• May transfer cullet to and from crusher, using industrial truck.
• Workers who unload bulk ingredients from railcars and truck and tend crushers may be designated batch unloader.