 He is a member of the International Commission on Sources of the History of Korea; Korean Studies Associations in Europe, Asia and USA.He gave over 50 public lectures in the top universities internationally.Since 1996 he is the Chief-editor of the journal "Newsletter of Korean Studies in Central Asia" and is a member of the editorial board of the journals "Acta Koreana" (Los Angeles), "Korea Forum" (New York), "International Area Review" (Seoul);  “Studies of the culture of Koreans abroad” ( Institute for the studies of the Culture of Koreans abroad, Kongju National University) ; Journal of Contemporary Korean Studies (Seoul,