Member of the Technical Programme Committee of "IEEE ATM'97 Workshop”, Lisboa, May 1997, where he was Chair of a technical session.
Member of the Technical Programme Committee of "IFIP Broadband Conference”, Stutgard, Germany, June 1998.
Member of the Technical Programme Committee of "Symposium on Broadband European Networks and Multimedia Services (SYBEN 98)", Zurich, Switzerland, May 1998, where was Chair of a technical session.
Member of the Technical Programme Committee of "IEEE ATM´98 Workshop”, Fairfax, VA, EUA, May 1998.
Member of the Technical Programme Committee of "IEEE ATM’99 Workshop”, Kochi City, Japan, May 1999.
Member of the Technical Programme Committee of "IFIP TC-6 Fifth Fifth International Conference on Broadband Communications ' 99”, Hong Kong, November 1999.
Member of the Technical Programme Committee of "IFIP TC-6 Networking 2000 Conference", Paris, France, May 2000.
Member of the Technical Programme Committee of "IEEE Conference on High Performance Switching and Routing", Heidelberg, Germany, June 2000.
Member of the Technical Programme Committee of "3ª Conferência sobre Redes de Computadores (CRC'2000)", FCCN, Viseu, Portugal, September 2000.
Member of the Technical Programme Committee of "1st IEEE European Conference on Universal Multiservice Networks (ECUMN'2000)", Colmar, France, October 2000.
Member of the Technical Programme Committee of "2001 IEEE Workshop on High Performance Switching and Routing", Dallas, Texas, USA, May 2001.
Member of the Technical Programme Committee of "4ª Conferência sobre Redes de Computadores (CRC'2001)", FCCN, UBI, Covilhã, Portugal, November 2001.
Member of the Technical Programme Committee of "2002 IEEE Workshop on High Performance Switching and Routing (HPSR2002)", Kobe, Japan, May 2002.
Member of the Technical Programme Committee of "5ª Conferência sobre Redes de Computadores (CRC'2002)", FCCN, Faro, Portugal, September 2002.
Member of the Technical Programme Committee of "6th IEEE International Conference on High-Speed Networks and Multimedia Communications (HSNMC 2003)”, Estoril, Portugal, July 2003.
Member of the Technical Programme Committee of "6ª Conferência sobre Redes de Computadores (CRC'2003)", FCCN, Bragança, Portugal, September 2003.
Member of the Technical Programme Committee of “Workshop on Streaming Technologies”, organizado pelo Projecto OLYMPIC, Atenas, Greece, May 2004.
Member of the Technical Programme Committee of "IFIP Personal Wireless Communications 2004 (PWC’2004)”, Delft, Holand, September 2004.
Member of the Technical Programme Committee of "11th Asia-Pacific Conference on Communications (APCC 2005)”, Perth, Australia, October 2005.
Member of the Technical Programme Committee of “International Workshop on High Performance Switching and Routing (HPSR2006)”, Poznan, Poland, IFIP, June 2006.
Member of the Technical Programme Committee of “IFIP Networking Conference 2006”, Coimbra, Portugal, May 2006.
Member of the Technical Programme Committee of“31st IEEE Conference on Local Computer Networks (LCN 2006)”, Tampa, Florida, USA, November 2006
President of conference“The International Conference on Information Networking 2007 (ICOIN 2007)”, organized by INESC-ID e Secção Portuguesa do IEEE, 23-25 January 2007, Estoril, Portugal.
Member of the Technical Programme Committee of “International Conference on Complex Open Distributed Systems” (CODS'2007), Systemics and Informatics World Network (SIWN) /IEEE, Chengdu, China, July 2007 .
Member of the Technical Programme Committee of “32st IEEE Conference on Local Computer Networks (LCN 2007)”, Dublin, Irland, October 2007, where was Chair of a technical session.
Member of the Technical Programme Committee of “IFIP Networking Conference 2008”, Singapura, May 2008.
Member of the Technical Programme Committee of “IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Wireless Computer Networks (PIMRC´08)”, Cannes, France, September 2008.
Member of the Technical Programme Committee of “33st IEEE Conference on Local Computer Networks (LCN 2008)”, Montreal, Canada, October 2008.
Member of the Technical Programme Committee of “3rd ACM International Conference on Digital Interactive Media in Entertainment Arts (DIMEA)”, Special Session on User Centric and Personalized Multimédia Service Platforms, Athens, Greece, September 2008.
Member of the Technical Programme Committee of “The 2nd International Conference on Future Generation Communication and Networking (FGCN 2008)”, Hainan Island, China, December 2008.