A couple of controllers from the UK got jobs there recently but you have to have residency first. They have recently put up the requirements for residency so unless you have close relatives there it's probably not going to happen.
If you were to get a job there you would have to re-train from the very beginning including all the basics at college. Whilst you are training you get no pay and you have to pay NZ$10,000 for the course. Doesn't sound that appealing to me!