A professional who tends steam or gas-fired drum to dry grain or yeast. Respnsibilities include:

• Starts dryer, turns steam valve, or lights gas burner and observes thermometers and pressure gauges to heat dryer to operating temperatures.
• Opens valve or starts screw conveyor and vacuum pump to convey wet grain through heated drum and into discharge hopper.
• Observes feeder gauge and turns valve or moves rheostat lever to adjust flow of yeast or grain to capacity of dryer.
• Feels dried grain or yeast to judge moisture content or measures with moisture meter.
• Adjusts valves to vary heat of dryer and grain and yeast flow to change moisture content to specifications.
• When drying grain, attaches cloth bag to discharge hopper.
• Weighs filled bag and seams top of bag, using portable sewing machine.