He attended the Silver Jubilee Conference of International Federation of Agricultural Producers held at London in 1982 as Indian Delegate, attended the 2007 World Congress of World Agricultural Forum held at St.Luis, USA as Indian Delegate from May 8–10, 2007 and attended
ATP International Series | International Monetary Fund | International Red Cross and Red Crescent Movement | ATP International Series Gold | International Space Station | Amnesty International | International Olympic Committee | BirdLife International | International Finance Corporation | International Organization for Standardization | International Telecommunication Union | International Criminal Court | One Day International | International Nonproprietary Name | International Labour Organization | International Civil Aviation Organization | International Boxing Federation | Toronto International Film Festival | International Atomic Energy Agency | International Maritime Organization | International Development Association | John F. Kennedy International Airport | Los Angeles International Airport | International Bank for Reconstruction and Development | International Court of Justice | International Fund for Agricultural Development | Rotary International | Marriott International | International Air Transport Association | World Federation of Trade Unions |
Hannam was appointed by Prime Minister John George Diefenbaker to the National Productivity Council and was also a delegate to the United Nations Food and Agricultural Organization and served as president of the International Federation of Agricultural Producers.