Inria research Director. I lead RMoD http://rmod.lille.inria.fr. I'm expert in language design and reengineering. I worked on traits. Traits have been introduced in Pharo, Perl, PHP and under a variant into Scala and Fortress. I'm expert on software quality, program understanding, program visualisations, reengineering and metamodeling. I'm one of the developer of Moose, an open-source software analysis platform http://www.moosetechnology.org/. I created http://www.synectique.eu/ a company building dedicated tools for advanced software analyses. I'm one of the leader of Pharo http://www.pharo.org/ a dynamic reflective object-oriented language supporting live programming. I wrote couple hundred articles and several books. According to google my h-index is 53 for more than 12000 citations.