I don't know who Dwight Schrute is, so I don't know if you're being serious...but if you are, I worked as an off ice official 15 years ago for the Kentucky Thoroughblades (AHL) in their inaugural season (which was my last year of graduate school). I have some great stories from that year.
In case you are serious, the penalty box attendant does have responsibilities beyond the opening and closing of the door, and even that is a little more pressurized than you might think.
I don't know how one gets the job at NHL level; for me, I walked into Ron DiGregorio's office (the owner, also was the VP of USA Hockey at the time IIRC) and told him I was also from New Hampshire, loved hockey, and would love to work for the team. That was all it took...it's not like Lexington was a hockey hotbed before, during, or after the Thoroughblades got there.
Believe it or not, we did have two female off ice officials, and one did work the penalty box once (the assignments were rotated game by game). As for our dress code, we just had to wear slacks and a horrible plum colored sweater with a Thoroughblades patch. But, this wasn't exactly a well-oiled machine, given it was an expansion franchise. The goal judge sat on a stool, not in glass encased booth (cue up the Anchorman jokes) or anything, and was subjected to merciless heckling from the fans who were literally sitting right next to him.