@Markerrag -- Very true, particularly since trucking companies operate on very thin margins. Rates are cut to the bone because of all the competition, and a lot of pricey repairs and the like can turn a profitable operation into one that's losing money like crazy almost overnight.
But maintenance guys are trucking companies aren't the only ones critical to their companies. In many ways, your favorite information technology professional is a maintenance manager.
No, that is not a stretch. Think about the trouble that comes with a bunch of computers on a network that loses Internet connectivity all sudden like. Without proper care and maintenance, that unpleasant scenario can become a reality in a hurry.