Can't remember if Trans States Airlines has been discussed in this thread. I looked back for a mention until I got tired of looking. So, I'll put this here.
Trans states announced what appears to be a "flow" to Frontier Airlines (vs just the promise of an interview). There must be some more fine print to this thing but here are the main points. Frontier isn't the greatest at the moment but no one knows what the future holds for them; I've seen the customary merger rumors.
Not sure how this would apply to an E3 Aussie but Trans States does take Aussies:
“Trans States pilots will
forego Frontier's interviewing process, and flow to Frontier Airlines' flight deck as a First Officer. “
Trans States to Frontier Pilot Flow Program
E-3 Visa Candidates