Australian diplomat and expert involved in the 1995 Non-Proliferation Treaty Extension Conference.

Member of South Africa’s delegation to the 1995 NPT review conference.

Polish ambassador and chairman of the Drafting Committee at the 1995 NPT review conference.

Canada's Ambassador and Permanent Representative to the United Nations in Geneva (1999-2003)

Expert Advisor to Canada’s delegation to the 1995 review conference.

Former US Ambassador to South Africa.

Senior Advisor for Non-proliferation and Deputy Director of the Non-proliferation, Arms Control and Disarmament Division of the Canadian Department of Foreign Affairs.

Untied States special representative for Arms Control, Non-Proliferation, and Disarmament.

South African diplomat