About an application under SMC for Residence. See SM7.10 and SM7.15 here.
http://www.immigration.govt.nz/opsmanual/30545.htm In theory a job offer with a 12-month contract should be possible, but in practice, some people have found INZ saying there should be the prospect of more work with the firm to follow on.
For a WTR visa, the job offer has to be for a minimum of two years.
http://www.immigration.govt.nz/migra...quirements.htm
You can't do anything in advance for INZ. You have to have a firm offer of emplyment, in writing, and also send the contract with all the small print.