 Marin also served as visiting professor at several other universities (Zurich, Warsaw, Florence, University of Innsbruck, Institute of Health Sciences at H. A. Barceló Foundation and Hebrew University of Jerusalem).From 1988-2015, he was the Executive Director of the European Centre for Social Welfare Policy and Research, a think tank on economics and sociology (Vienna).Marin was director of Webster Vienna Private University from October 2015 until June 2016.