A professional who assists sewing-machine repairer in repairing household and industrial sewing machines. Responsibilities include:

• Lifts machines to work bench and disassembles parts, using wrenches and screwdrivers.
• Cleans parts, using solvent and rags.
• Replaces defective parts and reassembles machines.
• Starts and observes machines in operation to test performances.
• Uncrates and assembles new machines.
• Performs other duties as described under helper master title.