Appreciate the problem Java. The trouble is that "aviation related" jobs in Sydney are fairly rare, and when they do come up you have to be careful not to be trampled in the stampede. Even then they're mostly not particularly well paid. My advice would be research some of the larger companies who need people to run the business rather than running it themselves, target a role and see if you can network yourself inside.
If you purchase "The Australian" on Fridays and have a look in the aviation jobs section there are more positions in there than the flying jobs than Windy posts here of a Friday. This should give you an idea of what roles come up from time to time and qualifications they are looking for.
Good luck!