Stefano Leonardi is currently a full professor at Sapienza University of Rome. He has authored more than 120 publications in leading international conferences and journals in the areas of the design of online and approximation algorithms, algorithmic game theory and mechanism design, Web search and mining. He is also a winner of a Google Faculty Award and a co-winner of a Google Focused Research Award. He has served on the program committees of leading international conferences on algorithms, economics and computation and web technologies. He served in 2005 as Program Chair of the European Symposium on Algorithms (Design and Analysis Track). He is on the editorial board of the ACM Transactions on Algorithms. In 2009 he chaired the 5th Workshop on Internet and Network Economics. In 2013 he was the main organizer of the ACM International Conference on Web Search and Data Mining (WSDM) held in Rome and in 2015 one of the organizers of the WWW conference to be held in May 2015 in Florence.