In 1998 he was elected as Member of the International Training Standards and Policy Review Committee of the Albert Ellis Institute in New York.
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In 1999 he became the founder and president of the Association for Cognitive Management and of the Institute for Cognitive Management in Stuttgart, Germany, an affiliated training centre of the Albert Ellis Institute in New York.
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He was a leading methodologist at the Centre for Comparative Studies of Technological & Social Progress in Novi Sad from 1981-1987 and worked as professor of psychology at the high school of Management and Informatics at the University of Novi Sad from 1989 to 1992.