Hunter will join Unicef in January from the NSPCC, where he has worked as deputy director of fundraising for the past seven years.
He will be based at the charity's offices in Geneva and succeeds Per Stenbeck, who is retiring after five and a half years in the role.
"I am incredibly excited," said Hunter. "I have loved my time with the NSPCC - we have achieved a lot together and I have helped it to grow. What Unicef offers is the chance to continue to work with children, but on a global scale. It's an amazing cause and an incredible opportunity."
- Tamara Hinson, email@example.com