A professional who tends machine that forms (twists) rope-fiber yarn into strands preparatory to being laid into rope. Responsibilities include:

• Installs specified size tubes that gather and compress yarn preparatory to twisting.
• Places specified number of full yarn bobbins on creel.
• Threads yarn ends from bobbins through holes in register plates that align yarn through gathering tubes around capstan that maintains tension on strand, and ties end to reel that revolves to twist and form strand.
• Stops machine to repair yarn breaks.
• Removes full reel, using hoist.