A professional who tends machine that tightens twist in skeins of dyed thread. Respnsibilities include:

• Opens and examines skeins of thread to ensure that thread matches specifications of work order.
• Hooks one end of skein to upper hook of machine and hooks other end to lower hook on movable beam of machine.
• Releases clutch that lowers beam and stretches skein.
• Turns crank that rotates beam and twists skein.
• Feels skein to determine if twist has been tightened as specified.