He passed his master degree in 1993 and his PhD thesis in computer science in September 1997. From 1998 to 2004 he was an associate professor at the University of Pau (France). In February 2006, he passed his habilitation diploma. He does researches on exact global optimization algorithms and applied it to solve inverse problem of the design of electromechanical actuators since 1995 via collaboration with the LEEI-UMR 5828, CNRS, Toulouse. He also solves numerically some open problems in planar geometry via collaboration with the GERAD-Montréal, Canada, yielding the determination of four small octagons; most of these problems were opened since 1922. For details, http://www.n7.fr/~messine