Martin Snedden is standing down after two years in his role as chief executive of Duco Events.
The 58-year-old announced his departure to staff on Tuesday, following Joseph Parker's historic WBO Heavyweight Championship win over the weekend.
A statement from Duco confirmed Snedden's final day with the company will be next Friday, December 23.
"Joseph's win over Andy Ruiz last Saturday night nicely bookends my two years at Duco Events," said Snedden.
"When I started working with David Higgins and Dean Lonergan in 2014, the objectives were to move Joseph from a boxing ranking outside the top 15 to a world championship title.