J.P. Rosen graduated from ENST (French engineering school) in 1975, and obtained PhD in 1986. He started as a software engineer at the computing center of ENST. After a Sabbatical at New York University on the Ada/ED Project, he worked as Professor at ENST, where he was responsible for the teaching of Software Engineering, compilation and Ada. He has now formed Adalog, a company specialized in high level training, consultancy, and software development in the fields of Ada and associated technologies (software engineering, object oriented methodologies). Adalog is the official ACAL (Ada Compiler Assesment Laboratory) for the validation of compilers, and provides several tools as free software to the community. J-P. Rosen is a member of the ARG (Ada Rapporteur Group), the group of experts in charge of maintenance and evolution of the language. He was a member of the expert team who controlled the development of the validation suite for Ada 95. He is the author of "Méthodes de Génie Logiciel avec Ada 95" (Software Engineering Methods with Ada 95) and "HOOD: an industrial approach for software development".