Diesel mechanics work on anything powered with a diesel engine including trucks, heavy equipment, trains, and boats. A career in diesel mechanics may be right for you if you are mechanically inclined and enjoy working with tools and repairing machines. If you choose this career, you must be able to use pneumatic tools, welding and cutting equipment, and hand tools. Diesel mechanics must also have expert knowledge of brake systems, transmissions, electronic components, and computer processors specific to diesel powered vehicles. Because much of the training is on-the-job, you could entire directly into this career after completing high school. However, you will become more successful financially by completing a technical or community college training industry certification.