If you stay at the transit area, i.e., Australia International Airport before boarding a New Zealand flight, you will not need a visa. You will not require a visa until you don’t decide to leave the airport.
Typically, it takes 4-5 months to get your visa granted. To know more about Subclass 185 click here(link the subclass 186 page here).
Your Australian employer should offer you at least 2 years employment in order for you to avail the Subclass 186. Once you are granted Subclass 186, there are no particular requirements that you should remain with the employer.
Connect with Medix Migration where you will find immigration experts who are ready to resolve your queries. Click here to connect.( link the contact us page)