Kordia Group chief executive Scott Bartlett has stepped down to focus on his health, the state-owned enterprise said in a statement.
In August 2019, Bartlett was diagnosed with multiple brain tumours.
"After undergoing a period of remission, he returned in January 2020 to resume his role but unfortunately become ill again two months ago," Kordia said this morning.
Bartlett, who has been chronicling his illness via his Instagram account, was just five years out of university when the ISP he was working for, Orcon, was sold by founder Seeby Woodhouse to Kordia for $24.3 million in 2007.