I throw this out there for any offshore who is considering moving to ASA.
In attempting to put a bum on a seat you may very well find that while you have a licence, those making the seat decision may not take into consideration you actual skill set/discipline. Believe me when I say if you're an Approach/Terminal controller, you may very well find yourself in a high level enroute sector or working some type of procedural sector . For some, a controller is a controller is a controller, and the change of scenery may be great. For other veterans with many years in a discipline, change may be not so good.
Just be aware, as even a signed offer letter may not be worth a paper it's printed on.