Sponsoring engineers to come to Australia is definitely possible -- and in fact we've done it in the past for certain roles. But, as in some other countries, it does come with the caveat that you need to be able to justify the sponsorship with evidence that it's not possible to find anyone who could do the role and who already has the right to work in Australia.
We're pretty open about what sort of candidates we'd consider: we're looking for good engineers to join the team, and are willing to accept that that means that we might have to spend some time and effort training them up in the technologies we use, etc. I think that's a great attitude for us to have. But it does make it pretty difficult for us to turn around and tell the government "we have to bring this specific individual from overseas because no Australian has the exact skillset we need for this role".
Also didn't Trump tell Turnbull that he is an idiot for asking him to take 2000 refugees when he just signed the anti-muslim order?