Host said: Do some companies pay a lot more for this position than others? What does a top earner make in this field?
What skills should you learn to increase your salary?
I received 4 months full-time & certification in diesel engine repair through serving in the military. However, upon becoming a civilian again, I learned that one needed over $2,000 worth of tools before an employer would hire you (I'd applied at Cummins, Caterpillar, etc.).
If you don't have the training yet, the military would be a viable option to receive free schooling.
Diesel Engine Repair persons are in high demand nation-wide. I note that the military services (U.S. Dept. of Defense = employer) is hiring many civilians now to do this work.
The more highly specialized you are and the more types of equipment you can work on, the more marketable your skills will be. I was trained to work on heavy construction equipment.
I hope this helps.