He has taught at the School of Economics and School of Law at Charles University in Prague. From 1969 until June 1998, he was director of the Henry Dunant Institute in Geneva, the research and training center of the International Red Cross. He also taught at the University of Geneva and was a visiting professor at Santa Clara University, George Washington University, and Universite de Franche-Compte in Besancon.

Legal aspects of war, humanitarian law, international organizations, and a seminar in international human rights, international law

Professor Toman is a member of the editorial boards of several journals and is a member of several international associations. Since 1994, he has been a foreign member (academician) of the Russian Academy of Natural Sciences.