A professional who tends battery of machines that clean rough grain preparatory to milling, and mill, brush, grade, and polish grain. Respnsibilities include:

• Starts machines, such as shelling stones, grain hullers, paddy separators, grain brush, grain cleaning machine, and grain polisher.
• Turns wheels to adjust feeder equipment of machines.
• Turns valves to regulate flow of compressed air into machines to blow chaff and dust from grain.
• Examines grain during processing to ensure that production and quality standards are met.
• Adjusts machines.
• Opens gates on feed pipes to route grain to designated milling machines.
• Performs maintenance duties, such as scraping sieves in machine with stick to remove dirt, straw, or other foreign material, lubricating equipment, and tightening belts, bolts, and nuts, using mechanics handtools.
• Gauges height of grain in storage tank, using tape measure.
• Converts measurement to number of bushels in bin, using conversion chart.