I dont think they give you a choice on certificate (long time since I interviewed). Latest positions available are for Shuttle America. I am not 100% accurate with the lateral movement from RPA to S5 or CHQ. The company allows that at their discretion. Senior FOS at all 3 though. Roll the dice on which 1. Working for the 3 is the same anyway.

Great people work at all 3. Good Luck on the interview! Try not to get caught up in all of the bitterness. I still enjoy coming to work believe it or not. You make it out to be what you want. The majority of the crews are good people and fun to work with.