As a consequence of the two intersecting facts that this is in fact a for-profit company and the United States is organised such that this, as with many things, is regulated by the fifty States rather than federally, there's not even a training requirement.

That is, the people driving a police car, fire truck or ambulance might have no training in how to do so properly, despite the (not unreasonable) expectation from the public that they'll perform better and the legal difference in how they are treated when doing so. Some employers might do better, but there's no universal standard.

The results are predictable, excess death and injuries as a result of giving inadequately trained individuals a relatively heavier, more powerful vehicle.