The Royal Commission set up to look into the circumstances around the Christchurch mosque shooting which killed 51 people will start looking at evidence next week.
Former diplomat Jacqui Caine, the former New Zealand Ambassador to Chile and most recently Te Rūnanga o Ngāi Tahu director of special projects in Christchurch, will join Commission chairman Sir William Young.
"The Government is confident that the Royal Commission now has the right people in place to carry out the important task of fully understanding what happened in the lead-up to the March 15 terror attack, what could have been done to stop it and how we can keep New Zealanders safe," Prime Minister Jacinda Ardern said.
The Commission was scheduled to begin considering evidence from Monday and was due to report back by December 10.
Caine resigned from the Ministry of Foreign Affairs and Trade to take up the role.