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Diesel Mechanics

Certification, Licensing, and Special Requirements

Certification or Licensing

One indicator of quality for entry-level mechanics recognized by everyone in the industry is certification by the National Institute for Automotive Service Excellence. There are eight areas of certification available in heavy-duty truck repair: gasoline engines; diesel engines; drive train; brakes; suspension and steering; electrical/electronic systems; heating, ventilation, and air conditioning; and preventive maintenance inspection. There are seven areas of certification available in school bus repair: body systems and special equipment; diesel engines; drive train; brakes; suspension and steering; electrical/electronic systems; and air-conditioning systems and controls. Applicants must have at least two years of experience in the field and pass the examinations related to their specialty. To maintain their certification, mechanics must retake the examination for their specialties every five years. 

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