João Leite is Associate Professor at the Computer Science Department of the Universidade Nova de Lisboa, Portugal, and member of the Nova Laboratory for Computer Science and Informatics (NOVA LINCS). João's main research interests include Knowledge Representation and Non-Monotonic Reasoning, Multi-Agent Systems, Semantic Web, and Argumentation for the Social Web. He has authored one book, edited several books and journal special issues, co-authored more than 100 papers, and presented more than 10 courses and tutorials in Conferences and Summer Schools. He was Conference Chair of JELIA-2004, Program Committee Co-Chair of JELIA-2014, and Co-Chair of several editions of the CLIMA, LADS and DALT workshops. He regularly serves in the Program Committees of major international conferences (IJCAI, AAAI, KR, AAMAS, ECAI, ICLP,...).