Company Description. Woman-Owned Company. Privately Owned Company. Role Description. This is a full-time on-site role for a Diesel Mechanic at Without A Doubt Truck and Trailer Repair located in Fairfield, OH. The Diesel Mechanic will be responsible for performing routine vehicle and equipment maintenance, diagnosing and repairing diesel engines, conducting preventive maintenance, and working with heavy equipment. Uniforms provided- at no cost. P...