MediaWorks group chief executive officer, Sussan Turner has resigned after 30 years with the company.
The head of the MediaWorks Television operations - Paul Maher - is tipped to be appointed the top job.
MediaWorks owns TV3, Four and half the country's commercial radio brands including More FM , RadioLive, The Edge and The Rock and others.
Maher is a former head of sales and marketing at Television New Zealand has been heir apparent. He took on the TV role at MediaWorks in April 2012.
He had been open about his aspirations for the vacancy as chief executive of TVNZ.