Sami Erol Gelenbe (born 22 August 1945, in Istanbul, Turkey) is a Turkish and French computer scientist, electronic engineer and applied mathematician who pioneered the field of Computer System and Network Performance in Europe, and is active in many research projects of the European Union. He is Professor in the Institute of Theoretical and Applied Informatics of the Polish Academy of Sciences (2017-), Associate Researcher in the I3S Laboratory (CNRS, University of Côte d'Azur, Nice) and Abraham de Moivre Laboratory (CNRS, Imperial College). He has held Chaired professorships at University of Liège (1974-1979), University Paris-Saclay (1979-1986), University Paris Descartes (1986-2005), Nello L. Teer Professor and ECE Chair at Duke University (1993-1998), University Chair Professor and Di