Bega Cheese director Jeff Odgers will step down from the role on June 30.
Mr Odgers, who farms at Ardmona, made the decision after his son died in a farm accident in March.
“Jeff has been a wonderful contributor to the success of Bega Cheese,” a company statement said.
“His knowledge of the industry from local on-farm issues to global dairy market dynamics have been invaluable.”
Mr Odgers has been a director of Bega Cheese since 2011, having initially joined the company in 2009 as a director of Tatura Milk.
The Bega Cheese board is now on the lookout for a replacement.