CHAIRMAN of Sessions, Member of the International Advisory Committee, or of the Organizing Board of International Scientific Meetings.
1998 - International Summer School on Structure and stability of nucleon and nuclear systems", Predeal, Romania.
Chairman of a morning session.
1999 - International Workshop on Nuclear Theory, Rila Mountain, Bulgaria.
Chairman of a morning session and of the gala dinner.
1999 - 7th International Conference on Clustering Aspects of Nuclear Structure and Dynamics (CLUSTER '99), Rab Island, Croatia. Chairman of the last session.
1999 - 2nd International Conference on Fission and Neutron-rich Nuclei, St Andrews, Scotland, United Kingdom. Member of the International Advisory Committee.
1999 - International Symposium on Advances in Nuclear Physics, Bucharest, Romania. Co-chairman.
2000 - NATO Advanced Study Institute: Nuclei far from Stability and Astrophysics, Predeal, Romania. Co-Director
2001 - International Workshop on Biological effects of ionizing radiation, electromagnetic fields and chemical toxic agents, Sinaia, Romania. Member of the International Advisory Committee.
2002 Third International Balkan Workshop on Applied Physics, Targoviste, Romania. Member of the International Advisory Committee.
2002 - HIPAN2002, International Conference on Applications of High Precision Atomic and Nuclear Methods, Neptun, Romania. Member of the International Advisory Committee.
2002 - Third International Conference on Fission and Properties of Neutron-Rich Nuclei, Sanibel Island, Florida, USA.
Member of the International Advisory Committee.
2003 - International Workshop on New Applications of Nuclear Fission, Bucharest, Romania.
Member of the International Advisory Committee.
2003 - NATO Advanced Study Institute: Structure and Dynamics of Elementary Matter, Kemer, Turkey.
Chairman of a session.
2005 - Carpathian Summer School on Exotic Nuclei and Nuclear/Particle Astrophysics, Mamaia, Romania.
Chairman of a session.
2006 - The 6th General International Conference of the Balkan Physical Union (BPU-6) Istanbul, Turkey.
Chairman of a session.
2006 - Predeal International Summer School on Collective motion and phase transitions in nuclear systems.
Chairman of two sessions.
2007 - Forth International Conference on Fission and Properties of Neutron-Rich Nuclei, Sanibel Island, Florida, USA.
Member of the International Advisory Committee.
2012 - 4-th International Conference on Current Problems in Nuclear Physics and Atomic Energy, Kyiv, Ukraine.
Chairman of a parallel session.
2012 - 10th International Conference on Clustering Aspects of Nuclear Structure and Dynamics, Debrecen, Hungary.
Chairman of a session.
2012 - Fifth International Conference on Fission and Properties of Neutron Rich Nuclei, Sanibel Island, Florida, USA.
Member of the International Advisory Committee.
2016 - 11th International Conference on Clustering.
Chairman of a plenary session.
2016 - 6th International Conference on Fission and Properties of Neutron-Rich Nuclei, Sanibel Island, Florida, USA.
Member of the International Advisory Committee.