A professional who tends equipment that blends batches of smokeless powder to obtain final product having uniform ballistic properties. Respnsibilities include:

• Moves levers in control room to activate rotation equipment or to transfer powder repeatedly between top and bottom bins to effect thorough mixing.
• Opens vent in bottom bin to dump powder into containers or buggies for storage, shipment, or further processing.
• May add or remove powders in rotating blender barrels, using hand scoop, to adjust mixture or remove sample.
• When tending machine equipped with toothed rotors to blend powder, is designated Macerator Operator.
• May be designated according to kind of powder blended as Tetryl-Blender Operator.