Had a mate go through the selection process recently.
From memory;
Nav Service Officers (flight planning etc) start on $65k plus Super (9%) = $71k package. No increments past that, just CPI (around 3%) if you get it (not a certainty). 24/7 roster, planned as 4 days on 3 off 4 days on 4 off, though this "changes" througout the roster period as resources dictate.
Wouldn't think they would sponsor foreigners at this stage, there are always quite a few people who apply for this job locally.
I'll try and contact him and see if I can find out more