This year's challenge, "How can we stop people profiting from migration?", will involve visits to organisations on the frontline of the refugee crisis, as well as to De La Rue, the world's largest commercial money and legal document printer.
Participants workshop their ideas before presenting back to officials attending the Commonwealth Heads of Government Meeting in Malta.
Mr Olsen was the youngest of the five New Zealanders attending the summit.
He hoped to return to New Zealand with a wealth of ideas to share.
"We are getting the knowledge and first-hand experience, but also want to come back and facilitate a discussion with young people around it."