He was Ambassador of the Republic of Korea to Austria and Slovenia, and Permanent Representative to the International Organizations in Vienna between 2016 and 2019. He served as the Chairs of the Nuclear Suppliers Group in 2017 and of the CTBTO PrepCom in 2019. After his retirement, he has been teaching at the Yonsei University (GSIS) and the Korea National Diplomatic Academy (KNDA), and also working as a Senior Policy Advisor at the Korea Institute of Nuclear Nonproliferation and Control (KINAC) in Korea.

Since joining the Foreign Ministry in 1981, Ambassador Shin has dedicated his career to multilateral and non-proliferation issues. From 2013 to 2016 he served as Deputy Minister for Multilateral and Global Affairs. Prior to his assignment he was Deputy Permanent Representative at the Korean Mission to the United Nations in New York (2011-2013). He was the Director-General for International Organizations at the Ministry of Foreign Affairs (2008-2010). In 2016 Ambassador Shin was appointed as President of the Institute of Foreign Affairs and National Security (IFANS).

He holds two Master of Arts degrees from the University of Pennsylvania and Yonsei University. In 1997 he was a Research Associate at the International Institute of Strategic Studies (IISS) in London, and served as an Advisor at the United Nations Foundation (New York) in 2010. During his diplomatic career, Ambassador Shin has written articles that have appeared in publications such as Survival (UK), Pacific Review (UK), Diplomacy (Korea), Foreign Policy (Korea), IFANS Review (Korea) and newspapers in Korea. He received the Order of Service Merit from the Government of the Republic of Korea.