A professional who installs and services collators, sorters, and other statistical machines in accordance with graphs and charts, using handtools and precision-measuring instruments. Responsibilities include:

• Assembles and installs machines, following timing and wiring charts and using handtools, calipers, micrometers, and other instruments.
• Starts machines and listens for sounds to locate electrical and mechanical defects.
• Examines wiring, cards, and printed tape for defects.
• Dismantles machines and repairs or replaces parts, using handtools.
• Tightens, loosens, sets, or otherwise adjusts gears, clutches, and electrical connections.
• May set up machine to obtain particular information by wiring and inserting board in machines and moving switches and levers.
• May instruct and advise operators of equipment in machine operation and in interpretation of setup charts.
• May supervise and instruct student servicers.