Chaesub Lee was elected Director of the ITU Telecommunication Standardization Bureau at the ITU Plenipotentiary Conference 2014 in Busan, Republic of Korea, and re-elected to this post for a second four-year term at the ITU Plenipotentiary Conference 2018 in Dubai, United Arab Emirates. Dr Lee has contributed ICT standardization for over 30 years, specializing in areas such as integrated services digital networks (ISDN), global information infrastructure (GII), Internet protocol, next-generation networks (NGN), Internet protocol television (IPTV) and cloud computing. He started his professional life in 1986 as a researcher at Korea Telecom. After 17 years he took up a role at the country’s Electronics and Telecommunications Research Institute (ETRI), where he stayed for the next eight years. Most recently he worked at the Korea Advanced Institute of Science and Technology (KAIST), and as a senior advisor to Korea’s Ministry of Science, ICT and Future Planning (MSIP). Within ITU Dr Lee served as Chairman of the ITU Focus Group on Next-Generation Networks (NGN) to address the growing need for international standards for NGN, including service requirements, functional architecture, mobility, security and Quality of Service (QoS). He was also Vice-Chairman of the ITU Focus Group on IPTV which worked to coordinate and promote the development of IPTV standards. He acted as Vice-Chairman of ITU-T Study Group 13 (Future networks and cloud) from 2001 until 2008, becoming Chairman of that group in 2009. ITU-T Study Group 13 develops standards for NGN, future networks, cloud computing, Internet of Things (IoT) and mobile telecommunications, to ensure their smooth international deployment.