What are the proceedures for a company to sponsor and Australian citizen on a 2 year working holiday visa?
A company cannot do this. A working holoiday Visa is issued to British (and some other Nationalities) for 1 year. I(f the holder completes three months working on a farm then a second year can be applied for. Sponsorship by companies is a whole different ball game and is done by Aussie Comapnies for skilled foriegners who have skills and qualifications not readily available in Oz.