I am a G550 F/O and recently changed jobs. I can say from first hand experience that we are rare commodity. Back in the day, Gulfstream owners would only employ captains, but nowadays with every management company trying to out cost save each other there is a demand for rated F/Os that just don’t exist.
I received 3 job offers within a few days of each other, including from Jet & Tag.
Surely paying 40% of a TR and not being bonded on a 550 is something many would jump at, or am I missing something?