Dunedin-born Philip Chronican has been made chairman of the BNZ's parent, National Australia Bank - the company that bore the worst of the Australian banking inquiry.
He replaces Ken Henry who, along with chief executive Andrew Thorborn, resigned after the inquiry.
Chronican, who was already a NAB director and who was acting chief executive after Thorburn's departure, was a director of BNZ.
He has more than 35 years of experience in banking and finance in Australia and New Zealand.
This included responsibility for Australia and New Zealand Banking Group Limited's (ANZ) Australia division, with specific responsibility for ANZ's retail and commercial businesses.