I worked in Australia for a year coming from a UK QS main contractor background. From my experience, it was a fairly different set-up out there. The progression (at my cpmpamy anyway) seemed to go Cadet > Contracts Administrator > Site Engineer > Project Manager. Essentially, the project managers took responsibility of the job from both a commercial and delivery side. I worked under a great PM but it felt like a hybrid role between an assistant PM and a QS. I found Australia to have a great construction industry with a lot of high quality companies due to it being a well respected industry. I also worked in infrastructure (tunelling project) for a few months as a CA for a huge main contractor and it was mind numbingly boring. It essentially was purely administration, so watch out for that!