He started to be involved in the promotion of libre software in 1991. Since then, he has carried on several activities in this area, including the organization of seminars and courses, and the participation in working groups on libre software, both at the Spanish and European levels. Currently he collaborates with several libre software projects (including Debian) and associations, writes in several media about topics related to libre software, and consults for companies and public administrations on issues related to their strategy on these topics.

His research interests include libre software development, with a focus on quantitative and empirical studies, and distributed tools for collaboration in libre software projects. In this area, he has published several papers, and is participating in several international research projects (more info in libresoft.urjc.es). He is also one of the initiators of the Morfeo Community (lead by Telefonica), for creating a community of companies interested in innovation with libre software models.

From a more educational perspective, he is one of the promoters of the idea of an European master program on libre software, and has specific interest in the education in that area.