The temporary work visa is designed to enable eligible employees to address their labour shortage issue by sponsoring or nominating skilled overseas workers to work in Australia on a temporary basis. The visa lets a skilled worker to live in Australia and work in their nominated occupation for their approved sponsor for up to 4 years.
Holders of Subclass 457 visa can:
You must be sponsored by an approved business in Australia to get the temporary visa. A business can sponsor or nominate someone for this visa if they are unable to find a suitable Australian citizen or permanent resident for the skilled work. Since this is a sponsored visa Australia, before you apply for it, your employer must become an approved sponsor and nominate you for the job position.