1959 - 1960	Study tour in Canada and Switzerland on Cooperative Movement Community Development and Adult Education Programs under the UN/ILO Fellowship for two months
Nov., 1965	Participated to the Asian Brotherhood Trade Union seminar Bagie City, Philippine
Apr. - Aug. 1967	Guest Lecturer at the Coady International Institute, St. Francis Xavier University, Antigonish, Nova Scotia, Canada
Sept., 1967	Under the U.S. Department of State 's Invitation, Participated to the cultural exchange program in the study tour of Cooperatives and Trade Unions in U.S.A.
Oct., 1967	Korean Delegate to the 3rd International Catholic Rural Conference Rome, Italy
Nov., 1967	Korean Delegate to the 3rd World Lay Apostate Congress Rome, Italy
May, 1968	Korean Delegate to the Policy Makers Seminar on social Justice and Human Development organized by Jesuit Fathers' Social-Economic Life in Asia (S.E.L.A) group Singapore
June, 1970	Guest Lecturer at Seminar on Trade Union and Cooperative in Asia Seoul, Korea
Jan., 1971	Guest Lecturer at the Afro-Asian Institute for Cooperative and and Labor Studies Tel-Aviv, Israel
April, 1971	Chairman, host and organizer of the 4th Asian Credit Union Leadership Training Conference, at the Cooperative Education Institute Seoul, Korea
May, 1972	Asian Delegate to the CIDSE (Coopération Internationale pour le Développement et la Solidarité, International Cooperation forDevelopment and Solidarity ) Conference, International Organization for Socio-Economic Development Plankenberge, Belgium
May, 1972	Guest Lecturer at the Afro-Asian Institute for Cooperative and Labor Studies Tel-Aviv, Israel
June, 1972	Organized and conducted the GRI, Gabriel Richard Institute for Leadership Training Courses for the Leaders of the Hong Kong Credit Union Movement Hong Kong
Oct., 1972	Guest Lecturer at the Maryknoll Fathers Seminary, Hingham Massachusetts, USA for the Seminar about Korea
Oct. 9, 1973	Appointed as a Member of Pontifical Council "Cor Unum" for Human and Christian Development and also a member of the Permanent Working Group on Development of Cor Unum for the first time in Asia as a non-priest
April 4, 1977	Reappointed as a Member of Pontifical Council "Cor Unum" for Human and Christian Development. Served Three Popes : Paul VI, John Paul I, and John Paul II as a member of Cor Unum