This could go either of 2 ways IMO. First would be what has already been said in this thread. You are being hired to what is currently known as Mesaba. This would give you a position in the Saab, 200, or 900. I don't think that Mesaba is short on people though, so I wouldn't expect this as the outcome.

My guess on this is that Colgan will no longer do any hiring. New hires from this point forward would be getting hired to the new Mesaba for positions on the planes that are currently Colgan. It would probably be pretty hard to merge the certificates if Colgan still has people in training.