Martin Snedden is stepping down after two years as head of New Zealand heavyweight Joseph Parker's promoters Duco Events.
The 58-year-old announced his decision following Parker's historic WBO Heavyweight Championship win over Mexican-American Andy Ruiz on Saturday night.
Snedden, a lawyer by profession, has been the chief executive of New Zealand Cricket in the past and led the 2011 Rugby World Cup organising team.
He is currently a director of both New Zealand Cricket and also of Auckland World Master Games 2017.
"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.
"We wanted to break into boxing promotion in Australia, while also delivering an NRL Nines event which showcased the sport and Auckland City.
"I leave Duco next week knowing those objectives have been fully or substantially achieved."
Director Dean Lonergan says Mr Snedden leaves Duco Events in the strongest position it has ever been heading into 2017.
"Martin has all our best wishes as he seeks new challenges. However, it will be 'business as normal' for Duco in 2017," said Lonergan.