Andrew McDowell

Hi, I'm currently on a 417 WHV, I've been working as a Software Engineer for the last 5 months, my contract is up at the end of this month but the company want to keep me on for another 6 months. Is there a minimum amount of time a company needs to commit to sponsoring someone or can they sort me a 457 visa for the next 6 months then when my contract is up, I can search for another sponsor during the 90 day period? I've a pretty good skill set which is in high demand so I have no doubt I could find another sponsor but just looking to know the likelihood of my visa being granted?