NIT final

[Nevadaref]

I found the selection of the crew to be curious.
Karl Hess worked 3 NCAA tourney games.
Mike Roberts did two. Jim Burr did none.

Now who selects the officials for the NIT? I thought it was the same group that made the NCAA choices, but perhaps not. In any event someone needs to explain to me how an official is qualified to work the NIT final, but not the opening weekend of the NCAA tourney. Burr also did three games in the Big East Conf tourney, including the final.
I understand that the Conf tourney is assigned by a different person, but seriously, can the opinion of an official be so vastly different that he gets multiple games and finals from certain folks and nothing at all from someone else. It would make far more sense to me if he got games from everybody or no postseason from any event.