Ankit Gupta, who only joined the firm six months ago, will lead the region from New Zealand.
Steve Tickner has most recently been acting general manager of livestock operations.
Rachel Callaghan joins the team on March 1.
Current advisory board member Kent Chaplin will be chief operating officer.
Turner replaces former Treasurer Jim Reardon, who left last year after 10 years in the role.
Wendy Alexander will cover the period between Bindi Norwell’s departure and the appointment of a new CEO.
Kirsty Mactaggart is a global capital markets professional with more than 25 years’ experience.
Richard Wyeth takes over from interim CEO Shiqing Jian.
Cameron George will remain as chair until the 2021 AGM
Dr Wayne Beilby is based in Tauranga.