A professional who mixes and dumps raw materials, such as silicas or clays, into mixers. Respnsibilities include:

• Obtains materials from storage area, using shovel, wheelbarrow, or towmotor, and transports material to batching area.
• Measures specified quantities of materials according to batch cards, using scales or measuring box.
• Dumps material from sacks onto conveyor leading to mixer or empties bulk material from wheelbarrow into mixer.