BusinessNZ chief executive Phil O'Reilly will resign from his role at the end of the year after a decade in the job.
"I have led BusinessNZ for 10 years through a period of rapid growth and incredible change," he said.
It was timely for a new leader to continue the work."
He said he had given a long period of notice because it would not be appropriate "as leader of an organisation representing most businesses in New Zealand to do other than announce my resignation openly so everyone is fully aware of my intentions."
O'Reilly said he was on a number of boards and advisory groups in New Zealand and in the next few months will be talking to each of them to assess his future role.