Shuttle is under Republic Airways (owns Shuttle, Republic, and Chautauqua) so you interview with Republic Airways and could be placed at any of the three companies based on company need/operational demand. Couldn't tell ya about the bases or the RSV time, but Republic should be hiring like crazy over the next couple months. Whether or not you go to Shuttle is up to them though, although you can switch companies/aircraft during captain upgrade (i.e. a Chautauqua 145 FO can upgrade to a Shuttle America 170).