It depends. Generally speaking, multinational companies will offer employment contracts through a local subsidiary. In that case the employment will fall under

It depends. Generally speaking, multinational companies will offer employment contracts through a local subsidiary. In that case the employment will fall under the laws of that country. And if they send you on an overseas business trip that doesn't change anything - even if the parent company is domiciled in that country. If they don't have a local presence, and you're working remotely, then you're more likely to be a contractor and dismissal laws are pretty loose. The interesting thing would be if they had a local subsidiary but chose to employ you on contract to the parent company. I suspect (but IANAL) that the Australian Fair Work Commission would determine that (if the contract was long term and indefinite) that you were actually an employee of the local subsidiary.