National conferences of biological psychiatry, Karlovy Vary 1983, 1985, 1987, 1989
IBRO, Prague, September 1990, (chairmanship, organizing committee)
Symposium on Calcium Antagonists, 143. A.P.A. meeting, New York, May 1990 (with drs.Berlant, Dubovsky, and Franks).
International CIANS/ISBM conference, Prague, June 21-23, 1990 (chairmanship, organizing committee)
International conference at the occassion of 30th Anniversary of PCP, president
Meeting on neuroscience, SN ČLS J.E.P., coordinator, 19.11.1991, Praha
"Satelite symposium C.I.N.P. "Prediction in psychopharmacology, Prague June 28-July 2,1992, president
International symposium on "BRAIN and MIND", Praha, CTS, Sept.1993; member, organizing committee
WHO/EMRC Workshop on Medical Research. Prague, Jan. 12 - 13. 1993.
Workshop on Controlling Internal Grant Agency. Prague, Ministry of Health, Jan. 15-18, 1993.
Symposium on Psychiatry in Central and Eastern European Countries (with N.Sartorius): 1stInternational Congress on Hormones, Brain and Psychopharmacology, Rhodos, Sept.12-18,
Conference on HEALTHY DEVELOPMENT OF THE MENTAL HEALTH CARE, Praha, Sept.29-Oct.2,1993, president
Symposium on Prediction in psychopharmacology, XIX.CINP Congress, Washington DC.,June 26-July 1,1994, chairman
1st Conference of The Czech Neuroscience Society (member, organizing committee), Prague, October 23-25, 1994
7th Congress of Association of European Psychiatrists, 18-22 September 1994, Copenhagen, Denmark
Xth World Psychiatric Congress, Madrid, Aug.23-28,1996, member, Program Scientific Committee.
1st International Conference on the New Medical Curriculum (chairman, organizing committee). Prague, 3rd Faculty of Medicine, January 9 – 10, 1998.
Congress AEP 2000 Prague (Association of European Psychiatrists), October 28 – November 1, 2000. (Member, organizing committee).
Scientific committee, 1st European Conference on Schizophrenia Research, Düsseldorf, Germany, September 26-28, 2007.
Member, Organizing Committee of the 6th Neuroscience conference with international participation "Theoretical and clinical implications of neuroscience". IKEM, Prague, November 19-20, 2007
President, XVIth European Psychiatric Congress (AEP), Nice, France, April 3-9,2008.
3rd Czech-slovak neuropsychoatric symposium. Andy Warhol Museum, Medzilaborce, Slovakia, 15 May 2008. member, organitzin and programme committee.
Member, International Scientific Committee, Controversies in Psychiatry (COPSy), June 18-21,2009, Berlin, Germany
EPA session- Beyond psychopharmacology-impact of trust, culture, and migration. 21st ECNP Congress, Barcelona, Spain, 30Aug-3 Sep 2008
Member, Scientific Committee, 11th Central European Neuropsychopharmacological Symposium, Belgrade, Serbia, 19-22 October 2008
Symposium EPA/ECNP "The ICD-11 and DSM-V in preparation: consequences for research and action (C.Hoschl, moderator). 22nd ECNP Congress, 12-16 September 2009, Istanbul, Turkey.
Honorary committee member, 4th Slovak Neuropsychiatric Congress with International participation. Jasná, Demänovská Dolina, Slovakia, 15-16 May 2014
Scientific Comittee Member, 23rd European Congress of Psychiatry. Vienna, Austria 28-31 March 2015
Scientific Committee member, VIII. Interdisciplinary Congress of the Czech Medical Academy, Mariánské Lázně, 26.-28.11.2015
EC member, 58. Annual meeting of the Czech Neuro-Psychopharmacological society, Lázně Jeseník, 6.-10.1.2016
62. Annual meeting of the Czech Neuro-Psychopharmacological society, Lázně Jeseník, 15.-19.1.2020.Gestor of symposium Application of new technologies in psychopharmacological research and treatment.