Atılım University

Mathematical Institute of the Serbian Academy of Sciences and Arts, Belgrade

Professor of Mathematics, Baylor University, Waco, Texas

Faculty of Mechanical Engineering University of Belgrade, Serbia

Professor of Mathematics, SUNY at Albany

Research scholar (IIT Roorkee)

Professor, Department of Mathematics, King Abdulaziz University

Department of Pure Mathematics, Institute for Quantum Computing, University of Waterloo

Professor of Mathematics, University of Toronto

University of L'Aquila