My FNQ spy indeed confirms all the above info posted about schools and staffing requirements
It is a prerequisite for employment with AO that you have Australian permanent residency status in order to receive an offer of employment. Do you have that by any chance?
It would seem that this is a MUST have for you in order to proceed with an application. As has already been advised in other posts, any positions will be advertised on the web site.
Good luck!