Joonkoo Yoo is a Professor of the Korea National Diplomat Academy, Ministry of Foreign Affairs and concurrently serves the inviting professor of GSIS of Yonsei University. He has been a member of advisory committee of Ministry of Foreign Affairs (MOFA), Ministry of Defence (MOD), and Ministry of Trade, Industry & Energy (MOTIE). He currently specializes in international law focusing on Science and Technologies Security and has served as a legal adviser for the cyber security UNGGE/OEWG, LAWS GGE. He served as Deputy Director of the Presidential Committee for the G20 Seoul Summit. Before teaching, Dr. Yoo was a legal adviser specializing in International Trade and Defence Acquisition with Aitken, Berlin & Brooman in Washington D.C..