The employee may frequently be exposed to adverse weather and other unpleasant conditions such as heat, cold, wetness and humidity; dim or bright lights, dust, odors, noise, vibrations, toxic agents, asbestos, lead paint, electrical currents, heavy machinery; and occasionally violence, smoke and disease. Graduation from high school and at least 1 year of specialized training in automobile and equipment mechanics, plus at least 4 - 6 years of related experience and certification as a journeyman mechanic; or any equivalent combination of training and experience which provides the following knowledge, ability and skills: Knowledge of.