Because it is more robust and produces more power than its gasoline cousin, the diesel engine is the workhorse that powers most large vehicles and equipment today. Diesel engine mechanics repair and rebuild diesel engines as well as the cars that they power. 

Mechanics can work on anything from bulldozers to farm tractors, and some even work on locomotives and boats. With the increased usage of electronic components in engine operation, mechanics increasingly employ handheld diagnostic computers and other specialised test equipment to determine the necessary repairs. 

Despite the fact that many technicians undergo years of on-the-job training, a formal diesel mechanic training programme is advised to improve the capacity to understand complicated technical documents and learn about the most recent engineering improvements. With a rising reliance on truck distribution of goods, this is a burgeoning profession with a high demand for experienced people!