Djamil Aïssani was born in 1956 in Biarritz (Basque Country, France). He started his career at the University of Constantine in 1978. He received his Ph.D. in 1983 from Kiev State University (Soviet Union). He is at the University of Bejaia since its opened in 1983/1984. Director of Research, Head of the Faculty of Science and Engineering Science (1999–2000), Director of the Research Unit LAMOS (Modeling and Optimization of Systems, http://www.lamos.org), Scientific Head of the Doctoral Computer School (2004 - 2011), he has taught in many universities (U.S.T.H.B. Algiers, University of Annaba, University of Montpellier, University of Rouen, University of Tizi Ouzou, I.N.H. Boumerdès, University of Bourgogne, University of Sétif, ENITA Bordj-el-Bahri, I.N.P.S. Ben Aknoun, Algiers Polytechnical School, Georgia Tech Atlanta, E.H.E.S.S. Paris, C.N.A.M. Paris,...). He has published many papers on Markov chains, queueing systems, reliability theory, performance evaluation and their applications in such industrial areas as electrical networks and computer systems. Prof. Aissani was the president of the National Mathematical Committee (Algerian Ministry of Higher Education and Scientific Research, 1995 – 2005).