A professional who tends battery of machines that twists together two or more yarn strands into twine or produce plied yarn for use in rope making. Responsibilities include:

• Transfers filled spools of yarn to adjoining twister frame that twists two or more strands together to make twine.
• Doffs machine and packs filled spools of twine and empty cylinders in cartons.
• May tend machines that spin roving into yarn preparatory to twisting operation.