A professional who tends one or more grinding mills that grind nibs (cracked cocoa beans) or preground nibs of cocoa bean paste to obtain liquid chocolate of specified consistency. Respnsibilities include:

• Starts machine and opens slide gate of hopper to release nibs, or turns valve to permit paste to flow through grinding stones.
• Observes ammeter on machine to determine amount of current produced by friction of grinding stone, and moves handles to adjust clearance between stones.
• Feels and tastes liquor to ascertain if texture conforms to standards.
• Draws sample for laboratory analysis.
• Pumps liquor to storage tanks.
• May pregrind nibs into paste-like consistency.