Chairman Lachlan Muldowney, on behalf of the Northern Districts Cricket Board, members, players and supporters, thanked Bradburn for his significant contribution to cricket in the region.
"Grant has been an integral part of ND over the best part of three decades, since his debut as a player in 1985. He has served us with distinction in a variety of roles, including as a leading off-spinning all-rounder, three years as captain, representing the Black Caps, working in a development role in one of our district associations, three years coaching Northern Districts A and the last five years as head coach of the Northern Knights," Muldowney said.
"We have enjoyed considerable team success during Grant's tenure, but equally pleasing for us has been the progression of a number of our players into the Black Caps. We are also extremely buoyed by the recent influx of quality young players that have emerged this season."
Bradburn will begin investigating career opportunities at the conclusion of the season.
Northern Districts Cricket will conduct an extensive search for a new head coach following the Ford Trophy, which Muldowney hopes will provide one last piece of silverware under Bradburn's watch.