Newly hired repairers, even those with formal training, usually receive some training from their employer. They may study electronic and circuit theory and math. They also get hands-on experience with equipment, doing basic maintenance, and using diagnostic programs to locate malfunctions. Training may be in a classroom or it may be self-instruction, consisting of videotapes, programmed computer software, or workbooks that allow trainees to learn at their own pace. Experienced technicians attend training sessions and read manuals to keep up with design changes and revised service procedures.
Many technicians also take advanced training in a particular system or type of repair.
Good eyesight and color vision are is needed to inspect and work on small, delicate parts and good hearing to detect malfunctions revealed by sound. Because field repairers usually handle jobs alone, they must be able to work without close supervision. For those who have frequent contact with customers, a pleasant personality, neat appearance, and good communications skills are important. Repairers must also be trustworthy because they may be exposed to money and other valuables in places like banks and securities offices, and some employers require that they be bonded. A security clearance may be required for technicians who repair equipment or service machines in areas where people are engaged in activities related to national security.