Mate, that sounds like some sensational flying. I think you should have no problems getting jobs elsewhere, but why would you? The current world situation is pretty dismal as you may know, and if 600 hours is all you have, you'll have trouble getting anything better than what you've already got. Also, if you're looking for work in oz, some employers prefer experience there, but quite frankly i think you have a dream job. Enjoy it a little longer.