Roberto Di Cosmo holds a PhD in Computer Science and is currently Computer Science professor at University Paris Diderot, after teaching for almost a decade at Ecole Normale Supérieure in Paris, and spending a few years at INRIA. He has been actively involved in research in theoretical computing, specifically in functional programming, parallel and distributed programming, the semantics of programming languages, type systems, rewriting and linear logic. He focus now on new scientific problems posed by the general adoption of Free Software, with a particular focus on static analysis of large software collections, that were at the core of the european reseach project Mancoosi. Following the evolution of our society under the impact of IT with great interest, he is a long term Free Software advocate, contributing to its adoption since 1998 with the best-seller Hijacking the world, seminars, articles and software. He created the Free Software thematic group of Systematic in October 2007, and since 2010 he is director of IRILL, a research structure dedicated to Free and Open Source Software quality. In 2016, he co-founded and directs Software Heritage, an initiative to build the universal archive of all the source code publicly available.