I would back up the comment that it isn't a guaranteed job, even if you pass all the exams.
A few years ago a bunch of trainees qualified but then found there were no vacancies. I believe this was due to the introduction of centralised approach meaning less contrlers were required.
I was given to understand Airways had to refund the course costs.
Still, at least they had licences so could tout their wares in Aus. Don'r know if a conversion course wold be required though.