Seven Studios CEO Therese Hegarty is departing in a restructure after eight years with the Seven Network.
Seven West Media CEO Tim Worner has resigned after 25 years with the Seven Network, succeeded immediately by James Warburton.
Brad Lyons, the Seven Network's former director of production and a network executive for 20 years, has died from cancer.
Tributes are flowing for "giant of television" David Leckie, who has died aged 70.