Membership in committees and societies:

• Chairman (1990 - 1995) of the Bulgarian National IGCP Committee (secretary of the same Committee in 1984-1990)
• Vice-President of the Bulgarian National Committee of Geology (1995-2009)
• President of the National Committee for the Carpatho-Balkan Geological Association(1995 - 2002)
• Co-ordinator of the ProGEO Working Group 1 for SE Europe (1995-1997)
• Chairman of the Bulgarian Working Group for the Geological Heritage(1995-1997)
• Member of the International Association of the Structural Geologists and Tectonists (since 1992)
• Member of the Editorial Board (1974-1989) and Chief Editor (1990-2009) of the journal Geologica Balcanica
• Member of the Union of Scientists in Bulgaria (since 1961)
• Fellow of the Bulgarian Geological Society (since 1960)
• Member of the New York Academy of Sciences (since 1994)
• Member of the American Geophysical Union
• Member of the Editorial Board and of the Scientific Council of the Geological Map of Bulgaria on the scale 1:100 000 (1982 - 1995)
• Member of the Scientific Board of the journal Geologica Macedonica
• Honorary Member of the Serbian Geological Society (2002)
• Member of the Scientific Council of Geoloski anali Balkanskog poluostrva (Annales geologiques de la peninsula Balkanique), Belgrade
• Vice-chairman of the Organizing Committee and Chairman of the Programme Committee for the International Year of Planet Earth - Bulgaria (since 2006)
• Member of the Editorial Advisory Board of Central European Journal of Geosciences
• President of the Bulgarian National Committee of Geology (since 2009)