I graduated from FCT/UNL in Engenharia Informática in 1979. From 1983 to 1987 I was a researcher at INRIA (Institut National de Recherche en Informatique et Automatique) in France where I worked on the Chorus Distributed Operating System and in the SOR teams. At the end of 1986 I got my PhD degree in Distributed Systems from Université de Rennes in France. From 1988 to 1992 I have been with the University of Lisbon and from then on with the New University of Lisbon.

I am a founding member of the Research Center for Informatics and Information Technologies ( Centro de Investigação em Informática e Tecnologias da Informação – CITI ) a research institute partially funded by the Portuguese National Science Foundation (Fundação para a Ciência e Tecnologia) and by the New University of Lisbon, Faculty of Sciences and Technology, Department of Informatics (DI/FCT/UNL), where it is located since its foundation in 1997. CITI has been recently replaced by the NOVA LINCS research center. My former research was related with distributed data replication, mobile systems and CSCW systems; currently, my main current research interests are related with routing in computer networks and the evolution of the Internet.

From 2007 to 2011 I was Head of the Department of Informatics and Vice Dean of FCT/UNL for the Scientific Council.

From 1990 to 1994 I lead the national project that established the Portuguese branch of the Internet and lead the PUUG – Portuguese Unix Users Group, and the portuguese branch of EUnet, both not for profit organizations promoting Open Systems and the TCP/IP network suite and the Internet adoption. In 1996 I was the main founder of a Portuguese Internet Service Provider that has been acquired in 2000 by the US based Qwest Communications Company. From 2000 to 2004 I acted as consultant and member of the board of the Company KPNQwest Portugal.

I am member since its foundation and currently I am the president of the board of the Portuguese Chapter of the Internet Society, a member of ACM and a senior member of IEEE.

I am also the author of the Computer Networks text book “Fundamentos de Redes de Computadores — Ilustrados com base na Internet e nos Protocolos TCP/IP,” NOVA FCT Editorial, Março 2018