Two pieces of advice I can offer you... It sounds like that would be a pretty good job bro... I don't know the pay in Australia and the specifics, but if its a really good job, personally, im not going to do anything to fuck that up... You should not even think about chancing something like that... Train naturally until your test and then do whatever you want...
If you are intent on pushing your chances then pm Needtogetaas and ask him personally... He will have a better answer than any of us can give on this...