Fortunately there's a group that can help take much of the guesswork out of finding a competent mechanic. The independent, nonprofit National Institute for Automotive Service Excellence, better known as ASE, is dedicated to improving automotive service and repair by testing and certifying the competence of individual mechanics, or "technicians," to use today's terminology.
ASE is the only automotive certification group that is both national in scope and industry-wide. It is self-supporting, with a forty-member, volunteer board of directors drawn from all segments of the automotive service industry, as well as representatives from education, government and consumer groups.