DeJoy and a few of his peers have shares in Oshkosh. It makes sense that he would award the contract to Oshkosh, a military contractor, to build even more vehicles for the government. The more immediate problem putting aside the obvious favoritism is that Oshkosh had and effectively still has no ability to actually build passenger vehicles, and is reusing the drivetrains they use for their military vehicles. Meaning they're dirty, inefficient, and stupidly overbuilt diesels instead of batteries and in-hub electric motors that would benefit from stop and go routines all day, and charging at a central location in a fleet overnight.