The main reason is probably that Australians qualify for the E3 visa, which makes it substantially easier for US companies to hire us over other foreign workers

The main reason is probably that Australians qualify for the E3 visa, which makes it substantially easier for US companies to hire us over other foreign workers. That said, there are plenty of other reasons Australians make great recruiting candidates for US companies. There are a lot of good Australian universities, the language/cultural barrier is minimal, and many Australians are wealthy enough to move internationally. For such a small country there sure are a lot of us spread around the globe. EDIT: Pivotal may have other reasons -- I don't work there, so I wouldn't know.