The Governor-General, on the recommendation of the Minister of Commerce, appoints Council members

Members, excluding the Consumer Representative, must be knowledgeable about professional engineering. The Minister, in making recommendations, must have regard to the aim that the members collectively represent the range of engineering practices and disciplines and not recommend a person who is a member of the 
governing body of the Registration Authority or an employee of the Registration Authority

(The Registration Authority is The Institution of Professional Engineers New Zealand Inc - IPENZ)

The Council must be composed of at least six, but no more than eight members including:

The Minister may appoint a Council Chairman and a Deputy Chairman from among the succesful candidates

The current Council membership can be seen by clicking here