Thae Yong-ho is the former-North Korean deputy ambassador to the United Kingdom. Prior to his defection to South Korea in 2016, he had worked for the DPRK Ministry of Foreign Affairs since the late 1980s. While working as a North Korean diplomat he represented the DPRK in Denmark, Sweden and Europe. He is one of the highest-ranking North Korean officials to ever defect from his position. Since coming to South Korea, Thae has been a prominent source of information, giving insight into North Korea’s authoritarian government and elite class in South Korea and overseas. He gave a congressional hearing at the House Foreign Affairs Committee in Washington DC and worked as an advisory researcher for the Institute for National Security Strategy in South Korea (2017-2018). In 2018 he published his memoir Cryptography of the Third-floor Secretariat. Currently, he is a free democracy activist working for Korean reunification.