Barry O'Sullivan is a senior lecturer in constraints at the Department of Computer Science at University College Cork in Ireland. He is the associate director of the Cork Constraint Computation Centre, Science Foundation Ireland principal investigator, president of the Association for Constraint Programming, chairman of the Artificial Intelligence Association of Ireland, coordinator of the European Research Consortium for Informatics and Mathematics (ERCIM) Working Group on Constraints, and a member of the Executive Council of the Management Science Society of Ireland. His research interests include real-world applications of artificial intelligence, constraint programming and optimization technologies.