Disarmament and International Security Committee.
- Secretary-General of the Organization for the Prohibition of Nuclear Weapons in Latin America and the Caribbean
- Head of the First United Nations Division, International Organisations Department, Ministry of Foreign Affairs of Nigeria
- Chair of the Biennial Meeting of States to Consider the Implementation of the Programme of Action to Prevent, Combat and Eradicate the Illicit Trade in Small Arms and Light Weapons in All Its Aspects
- Chair of the Group of Governmental Experts on Advancing responsible State behaviour in cyberspace in the context of international security
- Chair of the Open-ended Working Group on developments in the field of information and telecommunications in the context of international security