TVNZ chief executive Simon Power has resigned and will finish at the end of the financial year.
Power joined the broadcaster in March 2022 from Westpac New Zealand.
He is a former National Party MP and minister.
In an email to staff announcing his resignation, Power said it was a "tough decision, and the right time to make it".
"I'm incredibly proud to have led the business as we worked our way through the Public Media policy debate, and it's heartening to have seen a material lift in engagement over the last six months," Power said.
In February the proposed merger with RNZ, was set aside by the government.
Power said he was leaving the business in a "strong position" as it looked ahead to the next phase.
His time at TVNZ had been "exciting", "challenging" and "incredibly rewarding", he said.
In May 2022, Power ordered a review into TVNZ's hiring process, following the abrupt departure of Breakfast host Kamahl Santamaria.
The review covered TVNZ's recruitment practices and processes in general, as well as the specific recruitment of Santamaria. In addition, TVNZ took the opportunity to have a review of several policies, including those relating to internal workplace complaints and the development of TVNZ's 'Speak Up' Policy.
Power said his focus before he left would be ensuring TVNZ maintained its "positive momentum and are set up to succeed in FY24 and beyond".
His last day will be 30 June.