Diesel mechanics also do field work for heavy machinery, such as working on stationary generators for mission-critical businesses. This will take you out of a shop and in the field where you get a change of scenery, which opens doors and opportunity for growth. CAT, Cummins, Generac, etc. are all major generator manufacturers who offer specific training on their machines. Eventually, this route can lead you into a full time maintenance position at Hospitals or Data Centers or many other mission critical facilities where generators are vital to the business's operations. You could use this field as a stepping stone to get you into a better work environment if you so choose.