Carles Sierra has been contributing to Artificial Intelligence research since 1985 in the areas of Knowledge Representation, Auctions, Electronic Institutions, Autonomous Agents, Multiagent Systems, and Agreement Technologies. He has participated in more than 20 EU funded projects, is or has been member of several journal editorial boards including AIJ and JAIR and is the editor-in-chief of the JAAMAS journal. He has published more than 400 papers that have received 18000+ citations. He was the proud organiser of IJCAI 2011 in Barcelona and was the Program Chair of IJCAI 2017 in Melbourne. He is member of the Catalan Association of Artificial Intelligence (ACIA) and a EurAI Fellow. Carles Sierra was the recipient of the ACM/SIGAI Autonomous Agents Research Award 2019.