Bus and Truck Mechanics and Diesel Engine Specialists

People in this career spend their days inspecting, repairing, and maintaining mechanical and electronic equipment. They work on buses, trucks, and other diesel-powered engines, which includes marine and automotive diesel systems. Daily tasks require getting information about vehicle issues, troubleshooting mechanical problems, and making decisions to solve complex engine faults. Mechanics regularly operate vehicles and specialized equipment to test their work, which demands physical activity and careful control of machinery.

Success in this field relies on a strong realistic interest area, meaning a preference for hands-on, practical work. Key skills include repairing, equipment maintenance, and critical thinking to diagnose issues accurately. Mechanics must understand mechanical systems, transportation, and public safety. They also need basic knowledge of computers and electronics to work with modern diagnostic tools. Important work styles for this job include dependability, attention to detail, cautiousness, and the perseverance to solve tough mechanical problems.

To enter this career, workers typically need a high school diploma. The occupation is classified as requiring medium preparation, which often involves vocational training, an associate degree, or related on-the-job experience. Students preparing for this field often major in vehicle maintenance and repair technologies and technicians.

While not always mandatory, some states list a license for this work. Professionals can also earn various industry certifications to demonstrate their expertise. Examples of these credentials include Snap-on Industrial's Diesel Scanner Diagnostics Certification, and the Heavy-Duty/Diesel for Career-Technical Education certification. Specialized certifications are also available through the Emergency Vehicle Technician Certification Commission, Inc., such as Ambulance Technician Level I, ARFF Technician Level I, Fire Apparatus Technician Level I, and Law Enforcement Vehicle Installation Technician.

In 2025, the median annual pay for diesel mechanics and specialists was $61,770. Earnings can vary based on experience and location, with the lowest 10% of workers earning less than $44,530 and the highest 10% earning more than $88,740.

There are 289,960 people employed in this field. Between 2025 and 2035, employment is projected to grow by 3.6%, which is as fast as the average for all occupations. Workers can expect about 24,400 job openings each year during this ten-year period.