A professional who tends pumps to transfer grease and tallow from rendering tank to storage tanks, tankcars, and shipping containers. Respnsibilities include:

• Turns valves and starts pumps to start flow of material; stops flow when material reaches specified level.
• Observes measuring gauge reading on storage tank or measures material, using measuring rod, and compares reading with conversion chart to determine poundage pumped.
• Records poundage stored and shipped.