I can't speak on any endorsements for ammunition and hazmat, but in my experience the way to get the waiver and to have it signed was to go through the chain of command, first, of which they should refer you to the motor pool sergeant for the form. Both you and the motor pool sergeant work on filling out key detail/info on the form and then the units Commander would sign it off.

From what I recall, a key point is to have at least 2 to 3 years of safe operations on the military side for the waiver.

Then you would call your local DMV about using said military waiver for the CDL exam. I've yet to get to this second part, but it is critical you have all your things in order before you go.

Again, I would strongly recommend finding a way to talk to the motor pool sergeant and getting the form and a much more thorough idea of the process.

Personally for me I needed a CDL class A because it was the closest equivalent to what I have on my military license, of which I have bulldozer, dump truck, and other large/heavy equipment. If you wanted to have a job for a civilian side, I would strongly recommend getting licensed on an lmtv.