Di Taylor will begin her new role on December 1.
The first dedicated full-time CISO at the company will be primarily based in Christchurch.
Betts took up the newly created role of chief people officer on November 6.
The role of compliance officer is a new one.
Ronan moves into the chief marketing and brand officer role.
Cathy Brown steps down from her role after three years.
Greg Lowe will work alongside the Australia New Zealand Leadership Forum Australian co-chair Ann Sherry, AO.
Reuben Casey becomes CEO.
New director wrote study on cannabis use in spinal cord injury cases.
The new role is general manager, marketing and customer experience.