In Australia train dispatchers are known as train controllers. Most train controllers are employed by such Australian State and Federal Government organisations as the Australian Rail Track Corporation (ARTC), the Public Transport Authority of Western Australia (PTA), Queensland Rail, and Sydney Trains. Others are the employees of privately operated railways such as those found in the Pilbara region. The mining giants BHP Billiton, Rio Tinto, Fortesque Metals Group, and now also Roy Hill, all operate their own networks from Remote Operation Centres and employ large numbers of train controllers.