Society for Environmental Geochemistry and Health. International Committee for Radionuclide Metrology. Society of Mathematicians and Physicists of Croatia.
- Head, Physics & Chem Instrumentation Laboratory, Department of Research and Isotopes, International Atomic Energy Agency since 1989. Head of Laboratory for Nuclear Microanalysis, Professor of Physics, 1977-1985, Head, Nuclear Reactions Laboratory, 1967-1970, Rch Assistant, 1961-1965, Institut Ruder BoSkovic, Zagreb, Yugoslavia. Professor of Physics, 1971-1977, Rch Association, T W Bonner Nuclear Laboratories, 1965-1967, Rice University, United States of America.