University of Texas Department of Computer Science (UTCS) Associate Chair, 2015-present
RoboCup Federation Vice President, 2013-present (board of trustees, 2003-present; executive committee 1999-present)
International Machine Learning Society (IMLS) board of trustees, 2011-present
International Foundation of Autonomous Agents and Multi-Agent Systems (IFAAMAS) board of directors, 2008-2014
Association for the Advancement of Artificial Intelligence (AAAI) councilor, 2005-2008
Association for Trading Agent Research board of directors, 2003-2009
Machine learning Summer School (MLSS 2015) - Co-chair.
The Twenty-Seventh AAAI Conference on Artificial Intelligence (AAAI 2014) - Program co-chair.
The sixteenth RoboCup Symposium (RoboCup 2012) - Co-chair
The Twenty-Second International Joint Conference on Artificial Intelligence (IJCAI 2011) - Video Track Chair
The Tenth International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS 2011) - General co-chair
The Fifth International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS 2006) - Program co-chair.
AAAI-2005 Workshop on Multiagent Learning - Co-chair
ICML-2004 Competition and Workshop on Physiological Data Modeling - Co-chair
IJCAI-2003 Workshop on Trading Agent Design and Analysis - Co-chair
AAAI-2002 Fall Symposium on Personalized Agents - Co-chair
AAAI-2002 Spring Symposium on Collaborative Learning Agents - Co-chair
RoboCup 2001 - Associate chair
AGENTS-01 Workshop on Learning Agents - Co-chair
AGENTS-00/ECML-00 Joint Workshop on Learning Agents - Co-Chair
The Fourth International Workshop on RoboCup (2000) - Co-chair
Guest editor, Journal of Autonomous Agents and Multi-Agent Systems (JAAMAS) special issue on Multiagent Interaction without Prior Coordination (MIPC), 2016.
Co-editor-in-chief, Journal of Autonomous Agents and Multi-Agent Systems (JAAMAS), 2010-2017 (Associate editor 2003-2009)
Associate editor, Artificial Intelligence Journal (AIJ), 2007-2014
Editorial board, Machine Learning Journal (MLJ), 2003-present
Editorial board, Journal of Artificial Intelligence Research (JAIR), 2002-2005
Associate editor, ACM Transactions on Internet Technology (TOIT), 2003-2005
Associate editor, International Journal of Image and Graphics (IJIG), 2002-2006