Before joining Konkuk University, he was a senior researcher at MIRALab, University of Geneva, being involved in various research activities on networked virtual environments and ubiquitous computing systems. He received his PhD in Computer Science in February 2006 at ICU, Korea. His major research field is supporting scalability in networked virtual environments. His current research activities are focused on efficient communication middleware, event transmissions, and content distribution in networked ubiquitous computing systems.