There are lots of threads about XJT on here, do your research and ask around, but it's going to depend on if they're hiring on the CRJ or ERJ side if ATL would be available, and how senior that base is at the time.

Also, it's been rumored that there's lots of changes coming to that company as the regional industry gradually moves from 50 seat to 70 seat aircraft. Something to keep in mind and pay attention to.