A professional who tends machines that automatically wash, fill, and seal cans in cannery. Respnsibilities include:

• Pushes buttons and levers on control panel to start machines and monitors machine operations to verify that can washer, can food and liquid filler, can sealer, and conveyor mechanisms function in prescribed sequence.
• Observes cans leaving machines to detect defects, such as overfilled cans or misaligned lids.
• Pushes buttons to stop machines when machines malfunction, and notifies maintenance mechanic of detected defects.