For an overview, have a look at Working in New Zealand – lots of useful info there. Also check the New Zealand Skills Shortage website to see if chemical engineering is listed. If it is, it'll likely be easier to get a job and a visa.
What nationality are you and your wife? Will she be looking for work as well?
Expat Health Insurance
Cigna Global Health Insurance
With Cigna, you won't have to rely on foreign public health care systems, which may not meet your needs. Cigna allows you to speak to a doctor on demand, for consultations or instant advice, wherever you are in the world. They also offer full cancer care across all levels of cover, and settle the cost of treatments directly with the provider. Cigna is currently offering a 10% discount for seniors (over 60) on their Silver package.
Sirelo has a network of more than 500 international removal companies that can move your furniture and possessions to your new home. By filling in a form, you’ll get up to 5 quotes from recommended movers. This service is free of charge and will help you select an international moving company that suits your needs and budget.