| AAMAS | First International Joint Conference on Autonomous Agents and Multi-Agent Systems, 2002 – 2006, 2011. Senior programme committee: 2007-2010, 2012. Programme Chair in 2013, Track Chair of Virtual Agents and Humans in 2015. |
| CogSci | Cognitive Science Conference, 2005, 2006. |
| ECEC | European Concurrent Engineering Conference, PC member 2011. http://www.eurosis.org/cms/?q=node/1636 |
| EKAW | International Conference on Knowledge Engineering and Knowledge Management, 2002, 2004. |
| IAT | International Conference on Intelligent Agent Technology 2008: Vice Programme Chair, http://datamining.it.uts.edu.au/conferences/iat08/. PC member 2003, 2005, 2006, 2007, 2009, 2010. http://www.yorku.ca/wiiat10/ , http://www.wi-iat09.disco.unimib.it/IAT09/IAThome.htm |
| IEA/AIE | International Conference on Industrial & Engineering Application of Artificial Intelligence & Expert Systems, 2003, 2006. Co-organiser & Programme Chair 2013. |
| IJCAI | International Conference on Artificial Intelligence, 2009, senior PC in 2011. http://www.ijcai.org/ |
| PAAMS` | International Conference on Practical Applications of Agents and Multi-Agent Systems, PC member 2012. http://www.paams.net |
| AC | Artificial Cultures - engineering with social metaphors, 2005. |
| ACAN | International workshop on Agent-based Complex Automated Negotiations, 2009, 2011, 2012 http://www-itolab.mta.nitech.ac.jp/ACAN2009/ |
| AI | SGAI International Conference on Innovative Techniques and Applications of Artificial Intelligence. 2005. |
| AMPLE | Workshop at AAMAS 2012. |
| AOSE | International Workshop on Agent-Oriented Software Engineering, 2002. |
| AOTP | International Workshop on Agent Organizations: Theory and Practice, 2004 (co-organizer). |
| AT2AI | International Symposium "From Agent Theory to Agent Implementation", 2002, 2004. |
| AUTONOMY | International Workshop on Computational Autonomy, 2003. |
| BNAIC | Belgium-Dutch Conference on Artificial Intelligence, 2000 – 2008. |
| CEEMAS | International Central and Eastern European Conference on Multi-Agent Systems, 2005. |
| CIA | International Workshop on Cooperative Information Agents, 2002 – 2007. |
| COIN | Coordination, Organization, Institutions and Norms in Agent Systems, 2006, 2008, 2009, 2011, 2012, http://www.pcs.usp.br/~coin/ |
| CSCWD | International Conference on Computer Supported Cooperative Work in Design, 2001, 2005, 2006. |
| DALT | Declarative Agent Languages and Technologies (DALT) at AAMAS, 2003 – 2006. |
| ESAW | Engineering Societies in the Agents’ World, 2009 http://www.cs.uu.nl/esaw2009/ |
| EUMAS | European Workshop on Multi-Agent Systems 2003, 2005, 2008, http://eumas08.cs.bath.ac.uk/ |
| GDN | Group Decision and Negotiation, 2010, 2011, HuCom-track, co-organiser (2010) |
| HART | Human Agent Hart Teamwork, a series of workshops of informal character, since 2009. |
| HAIDM | workshop on Human-Agent Interaction Design and Models at AAMAS2012. https://sites.google.com/site/humanagentsystems/ |
| HuCom | Human and Computational Models in Negotiation 2008, http://mmi.tudelft.nl/hucom08/ |
| IAMSMAS | International Workshop on Infrastructure for Agents, MAS, and Scalable MAS, 2001. |
| ICAART | International Conference on Agents and Artificial Intelligence, 2009, www.icaart.org |
| ICAC | International Conference on Autonomic Computing and Communications, 2009, http://icac2009.acis.ufl.edu/ |
| ICIIP | International Conference on Intelligent Information Processing, 2002. |
| ISCRAM | Information Systems for Crisis Management Conference, 2005 – 2007. |
| KAW’99 | Knowledge Acquisition Workshop. (co-organiser of a track) |
| LOPSTR | International Symposium on Logic-based Program Synthesis and Transformation, Sweden, 2003. |
| LPAR | Logic for Programming Artificial Intelligence and Reasoning. 2006. |
| MAMA | International ICSC Symposium on Multi-Agents and Mobile Agents in Virtual Organizations and E-Commerce, 2000. |
| MAMSIE | Multi-Agent based Modelling and Simulation in Industry and Environment, a workshop at the European Simulation Symposion and Exhibition (ESS'01), 2001. |
| MASHO | Modelling Artificial Societies and Hybrid Organisations workshop, 2000 – 2003 (co-organizer) |
| MATES | German Conference on Multi-Agent System Technologies, 2005, 2006. |
| MSVVEIS | International Conference on Enterprise Information Systems, 2009. http://www.iceis.org/iceis2009/workshops/msvveis/msvveis2009-cfp.htm. |
| NetObjectDays | International conference Netobjectdays. 2006. |
| RASTA | Regulated Agent-Based Social Systems: Theories and Applications workshop, 2002, 2003. |
| RDA2 | Workshop on Rights and Duties of Autonomous Agents, collocated with ECAI2012. |
| RRS | 2nd International Workshop on Rational, Robust, and Secure Negotiation in Multi-Agents Systems, 2006. |
| SELMAS | International Workshop on Software Engineering for Large-Scale Multi-Agent Systems, 2003, 2004. |
| SIMULTECH | Simulation conference, 2014. |
| SOAS | International Conference on Self-Organization and Autonomic Systems in Computing and Communications. 2006. |
| Team | Teamwork and Coalition Formation, workshop at AAMAS, 2002. |
| TESADI'01 | Symposium on Technology, Economic and Social Applications of Distributed Intelligence, at IEEE International Conference on Systems, Man, and Cybernetics (SMC'01), 2001. |
| Trust | Deception, Fraud and Trust in Agent Societies workshop, 2001 – 2008, 2012 http://www.istc.cnr.it/T3/events/aamas/trust2008.html |
| WebNet | World Conference on the WWW and Internet, 2001. |