 From 1990-1995, he joined Germany´s leading think tank on politics, the German Institute for International and Security Affairs (SWP) at Ebenhausen and in 1992 qualified as professor with a book on systemic change in the Soviet Union.After working as professor for International Relations at the University of Konstanz in 1995, Segbers became professor for Political Science and East European Politics at the Institute for East European Studies and the Otto-Suhr-Institut at Freie Universität Berlin.He has conducted several research projects – among others one on Post-Soviet Puzzles (on spaces, territories, elites and interests in the FSU; published 1994/95) and one on Explaining Post-Soviet Patchworks (1998–2000) – and has implemented as well as supervised different study projects which since 2007 are integrated in the Center for Global Politics.