(2012). 16th IFIP WG 8.3 International Conference on Decision Support Systems (DSS), Anávissos, Greece, June 28-30
(2012). 18th CRIWG Conference on Collaboration and Technology, Duisburg, Germany, September 16-19
(2012). 16th IEEE International Conference on Computer Supported Cooperative Work in Design (CSCWD), Wuhan, China
(2012). ACM 27th Symposium On Applied Computing, 9th Enterprise Engineering track, Riva del Garda, Italy, March 25-29
(2012). International Conference on Information Systems for Crisis Response Management (ISCRAM) Vancouver, Canada, April 22-25
(2012). Workshop on Data-Driven Decision Guidance and Support Systems (DGSS), part of the 28th IEEE International Conference on Data Engineering (ICDE 2012), Washington DC, USA, April 1
(2011). 17th CRIWG Conference on Collaboration and Technology, Paraty, Brazil, October 2-7
(2011). VII Simpósio Brasileiro de Sistemas Colaborativos, Paraty, Brazil, October 5-7. Conference Co-Chair
(2011). 9th International Conference on Business Process Management, Clermont-Ferrand, France, August 28 – September 2
(2011). 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011), Lisbon, Portugal, May 8-11
(2011). ACM 26th Symposium On Applied Computing, Taiwan, March 21-25
(2011). 15th International Conference on Computer Supported Cooperative Work in Design (CSCWD) Lausane, Switzerland, June 8-10
(2010). 16th CRIWG Conference on Collaboration and Technology Maastricht, the Netherlands, September 20-23
(2010). 8th International Conference on Business Process Management, Hoboken, New Jersey, September 14-16
(2010). 15th IFIP WG 8.3 International Conference on Decision Support Systems, Lisbon, Portugal, July 7-10
(2010). 14th International Conference on Computer Supported Cooperative Work in Design (CSCWD 2010), Xangai, China, April 22-24
(2010). 2010 ACM Symposium on Applied Computing, 7th Enterprise Engineering track, Sierre, Switzerland
(2010). 7th International Conference on Information Systems for Crisis Response and Management, Seattle, WS, May 2-5. Research Methods Track, Track Co-Chair
(2009). 7th International Conference on Business Process Management, Ulm, Germany, September 8-10
(2009). 2009 ACM Symposium on Applied Computing, 6th Organizational Engineering track, Honolulu, Hawaii
(2009). 13th International Conference on Computer Supported Cooperative Work in Design (CSCWD 2009), Santiago, Chile, April 22-24
(2009). 2nd ICC Workshop on Complexity in Social Systems, Lisboa, January 10
(2009). 15th International Workshop on Groupware, Peso da Régua, Portugal, September 13-17
(2008). VII Jornadas Iberoamericanas de Ingeniería de Software e Ingeniería del Conocimiento (JIISIC ’08), Guayaquil, Equador, January 30 – February 1
(2008). 2008 International Conference on Information Resources Management (Conf-IRM), Track eCollaboration, Niagara Falls, Ontario, Canada, May 18-20
(2008). 10th International Conference on Enterprise Information Systems, Barcelona, Spain, June 12-16
(2008). 14th International Workshop on Groupware, Omaha, US, September 14-18 Program Co-Chair
(2008). 2008 ACM Symposium on Applied Computing, 5th Organizational Engineering track, Ceará, Brazil, March 16-20
(2008). International Conference on Collaborative Decision Making (CDM ’08), IFIP TC8/WG8.3 Working Conference, Toulouse, France, July 1-4
(2008). 1st ICC Workshop on Complexity in Social Systems, Lisboa, January 11-12
(2008). XATA2008 – XML: Aplicações e Tecnologias Associadas, Évora, Portugal, February 14-15
(2008). 12th International Conference on Computer Supported Cooperative Work in Design (CSCWD2008), Xi’an, China, April 16-18
(2008). The 26th ACM International Conference on Design of Communication – SIGDOC 2008, Lisboa, Portugal, September 22-24
(2008). 3ª Conferência Nacional em Interacção Pessoa-Máquina, Évora, Portugal, October 15-17
(2008). IHC 2008 – VIII Simpósio Brasileiro sobre Fatores Humanos em Sistemas – Competição de Avaliação de Sistema, Porto Alegre, Brasil
(2007). VI Jornadas Iberoamericanas de Ingeniería del Software e Ingeniería del Conocimiento (JIISIC ’07), Lima, Perú, January 31 – February 2
(2007). Information Resources Management Association (IRMA) 2007 International Conference, Vancouver, Canada, May 19-23
(2007). 9th International Conference on Enterprise Information Systems, Funchal, Madeira, June 12-16
(2007). The 22nd ACM Symposium on Applied Computing, Track on Organizational Engineering, Seoul, Korea, March 11-15
(2007). 11th International Conference on Computer Supported Cooperative Work in Design, Melbourne, Australia, April 26-28
(2007). 2ª Conferência Ibérica de Sistemas e Tecnologias de Informação, Porto, Portugal, June 21-23
(2007). 13th International Workshop on Groupware, Bariloche, Argentina, September 16-20
(2007). Mexican International Conference on Computer Science (ENC 2007), Track on User Centered Software Systems, Morelia, Mexico, September 24-28. IEEE Computer Society
(2007). XATA2007 – XML: Aplicações e Tecnologias Associadas, Lisboa, Portugal, February 15-16
(2007). 1st International Workshop on Enterprise Informations Systems Engineering (WEISE 2007), Regensburg, Germany, September 3-7
(2007). 13th International Workshop on Groupware – Doctoral Consortium, Villa la Angustura, Argentina. Program Chair
(2007). The 4th International Workshop on Computer Supported Activity Coordination (CSAC 2007), Madeira, Portugal, June 12-13
(2007). 3ª Conferência Nacional sobre Segurança Informática nas Organizações (SINO’2007), Lisboa, November 7-8
(2006). V Jornadas Iberoamericanas de Ingeniería de Software e Ingeniería del Conocimiento (JIISIC’06), Puebla City, Mexico, February 1-3
(2006). ICEIS 2006 – 8th International Conference on Enterprise Information Systems, Paphos, Cyprus, May 23-27
(2006). XATA2006 – XML: Aplicações e Tecnologias Associadas, Portalegre, Portugal, February 9-10
(2006). IADIS International Conference Applied Computing 2006, San Sebastian, Spain, February 25-28
(2006). The 21th ACM Symposium on Applied Computing, Track on ORGANIZATIONAL ENGINEERING, ACM SAC 2006, Dijon, France, April 23-27. ACM Press
(2006). The 10th International Conference on Computer Supported Cooperative Work in Design, Nanjing, China, May 3-5
(2006). The Second Workshop on Computer Supported Activity Coordination, Paphos, Cyprus, May 23-24
(2006). International Workshop on Advanced Software Engineering (IWASE 2006), Santiago de Chile, Chile, August 20-25
(2006). 12th International Workshop on Groupware, Medina del Campo, Spain, September 17-21
(2006). 1ª Conferência Ibérica de Sistemas e Tecnologias de Informação, Esposende, Portugal, June 21-23
(2006). 2ª Conferência Nacional em Interacção Pessoa-Máquina, Braga, Portugal, October 16-19
(2005). 7th International Conference on Enterprise Information Systems, Miami, Florida, May 24-28
(2005). IADIS Applied Computing 2005 Conference, Algarve, Portugal, February 22-25
(2005). The 20th ACM Symposium on Applied Computing, Track on Organizational Engineering (OE), SAC 2005, Santa Fe, New Mexico, March 13-17
(2005). XATA2005: XML: Aplicações e Tecnologias Associadas, Vila Verde, Braga, February 10-11
(2005). The Second International Workshop on Computer Supported Activity Coordination, CSAC-2005, Miami, Florida, May 24-25
(2005). 11th International Workshop on Groupware (CRIWG 2005), Porto de Galinhas, Brazil, September 25-29
(2005). International Workshop on Context and Group Work, Paris, France, July 5
(2004). 6th International Conference on Enterprise Information Systems, ICEIS 2004, Porto, Portugal, April 14-17
(2004). The 19th ACM Symposium on Applied Computing, Track on Organizational Engineering (OE), SAC 2004, Nicosia, Cyprus, March 14-17
(2004). The First International Workshop on Computer Supported Activity Coordination, CSAC 2004, Porto, Portugal, April 13
(2004). IADIS International Conference Applied Computing 2004, Lisbon, Portugal, March 23-26
(2004). 1ª Conferência Nacional em Interacção Pessoa-Máquina, INTERACÇÃO 2004, Lisboa, Portugal, July 12-14. Program Co-Chair. CSCW Track Chair
(2004). 10th International Workshop on Groupware, CRIWG ’04, San Carlos, Costa Rica, September 5-9
(2004). Conferência nacional sobre XML, aplicações e tecnologias associadas, XATA 2004, Porto, Portugal, February 11-13
(2004). IV Jornadas Iberoamericanas de Ingeniería de Software e Ingeniería del Conocimiento (JIISIC), Madrid, Spain, November 3-5
(2003). 5th International Conference On Enterprise Information Systems, ICEIS 2003, Angers, France, April 23-26
(2003). Workshop de Sistemas de Informação Multimédia e Cooperativos, COOP-MEDIA 2003, Porto, Portugal, October 8. Program Co-Chair
(2003). 9th International Workshop on Groupware, CRIWG 2003, Grenoble, France, September 28 – October 2
(2003). 4ª Conferência da Associação Portuguesa de Sistemas de Informação, CAPSI 2003, Porto, Portugal, October 15-17
(2003). III Ibero-American Symposium on Software Engineering and Knowledge Engineering, JIISIC 2003, Valdivia, Chile, November 26-28
(2002). 8th International Workshop on Groupware, CRIWG 2002, La Serena, Chile, September 1-4
(2002). 4th International Conference On Enterprise Information Systems, ICEIS 2002, Ciudad Real, Spain, April 3-6
(2001). 7th International Workshop on Groupware, CRIWG 2001, Darmstadt, Germany, September 6-8
(2001). Group Decision and Negotiation, GDN 2001, La Rochelle, France, June
(2000). Workshop Sistemas Multimédia Cooperativos e Distribuídos, COOPMedia 2000, Coimbra, Portugal, June 30. Program Chair
(2000). Sixth International Workshop on Groupware, CRIWG 2000, Madeira, Portugal, October 18-20. Organizing Chair
(1999). Workshop Computação Gráfica Multimédia e Ensino, CGME ’99, Leiria, Portugal, February
(1999). Fifth International Workshop on Groupware, CRIWG ’99, Cancun, Mexico, September 22-24.Program Chair
(1998). Fourth International Workshop on Groupware, CRIWG ’98, Buzios, Brasil, September 9-11
(1997). Third International Workshop on Groupware, CRIWG ’97, Madrid, Spain, October 1-3