A professional who supervises and coordinates activities of workers engaged in inspecting, testing, repairing, adjusting, and calibrating instruments, such as altimeters, ammeters, barometers, compasses, position indicators, steam gauges, tachometers, and voltmeters. Responsibilities include:

• Prepares work orders indicating malfunctions of instruments.
• Inspects and tests shop equipment and repaired instruments for conformance to quality control standards, using testing equipment, such as oscilloscope, pressure chamber, ammeter, and voltmeter.
• May disassemble, adjust, alter, repair, calibrate, and reassemble damaged or defective instruments, using tweezers and handtools.
• May train workers in inspecting, testing, repairing, and calibrating procedures.
• Performs other tasks as described under supervisor master title.