Co-Chair of IVA’2012 (together with Michael Neff, University of California – Davis, USA, Marilyn Walker, University of California – Santa Cruz, USA and Yukiko I. Nakano, Seikei University, Japan)
Financial Chair of AAMAS 2010 (The 9th International Conference on Autonomous Agents and Multiagent Systems), Toronto, Canada, May, 2010.
Organiser and Co-chair of the AAMAS-2009 Workshop on Empathic Agents, May, Budapest, 2009.
Virtual Agents Track co-chair at the AAMAS-2009, May, Budapest, 2009.
Member of the “Organizational Committee” of AIIDE 2008 (4th Conference on Artificial Intelligence and Interactive Digital Entertainment), California, USA, October 2008, organised by AAAI.
Local Organization Co-Chair of AAMAS 2008 (The 7th International Conference on Autonomous Agents and Multiagent Systems), Estoril, Portugal, May, 2008.
General Co-Chair of ACII 2007 (The Second International Conference on Affective Computing and Intelligent Interaction), Lisboa, Portugal, September, 2007.
Program Committee Co-Chair of DIGITEL 2007 (The First IEEE International Workshop on Digital Game and Intelligent Toy Enhanced Learning), Jhongli, Taiwan, March, 2007.
Program Committee Co-Chair of CASA 2006 (Computer Animation and Social Agents Conference), Geneva, Switzerland, July, 2006.
Short Paper Co-chair of IUI 2006 (International Conference on Intelligent User Interfaces), Sidney, Australia, January, 2006.
Co-Chair of IUI’2005 (Intelligent User Interfaces Conference do ACM) workshop on Affective Interactions: the computer in the affective loop, San Diego, USA, 2005.
Co-Chair of AAMAS’2004 (Autonomous Agents and Multi-Agent Systems Conference do ACM) workshop on “Empathic Agents”, New York, USA, 2004.
Local Chair of the Rescue Simulation League in the RoboCup’2004, Lisboa, Portugal, 2004.
Chair of the “International Workshop on Affective Interactions” organised in connection with the annual Conference of the I3 network. Sienna, Italy, 1999.
Co-Chair of the “European Conference on Artificial Intelligence in Education”, EuroAIED, Lisboa, Portugal, 1996.
Associate Editor, Reviewer and evaluator of the following journals and scientific organisations
Associate Editor of the journal “IEEE Transactions on Affective Computing” (2013-2015)
Associate Editor of the journal “IEEE Transactions on Computational Intelligence in Games” (2013-2015)
Member of the Editorial Board of the “Journal on Multimodal User Interfaces”
Member of the Board of Special Reviewers for the “International Journal on User Modelling and User- Adapted Interactions”.
Reviewer for the “Transactions on Human-Computer Interaction”, “International Journal for Visual- ization and Computer Animation”, “International Journal on Autonomous Agents and Multiagent Sys- tems”, “International Journal on Artificial Intelligence in Education”, “International Journal of Human- Computer Studies”, “Cognitive Science Quarterly”, “IEEE Man-Machine and Cybernetics”, “Journal of AI Communications”.
Member of the External Review Panel for EPSRC (Engineering and Physical Sciences Research Council) in the UK.
Evaluator for the Portuguese Science Foundation (FCT) and the Portuguese Innovation Association (Agência de Inovação).
Evaluator and Reviewer for the European Commission in the 5th, 6th and 7th and H2020 Programmes.