Major Educational Background
- Graduated from Osan High School in 1973
- Graduated from the 31st Naval Academy in 1977
- Graduated from the Department of Foreign Affairs and Security, Graduate School of Public Administration, Kyonggi University in 2003
- Completion of International Politics Course, University of Maryland, USA in 2006
- Completed the Ph.D. program in Political Science and Diplomacy, Graduate School of Public Administration, Kyungnam University in 2010

Major Career
- January 1996 Secretary for Defense at the Office of the President (~1998.1)
- November 2008 the Superintendent of the Naval Academy (~2010.6)
- October 2011 Chief of Naval Operations (CNO) (~2013.9)
- October 2013 Chairman, Joint Chiefs of Staff (~2015.10)
- December 2018 Director, Future Ocean Research Center, Hanyang University (ERICA)
- April 2021 10th, 11th President of Korea Seapower League (~Current)
- April 2022 6th, 7th Chairman of The Federation of Korea Maritime Industries (~Current)

Award
- ROK Presidential Citation
- Order of National Security Merit Tong-il medal/Gugseon medal/Samil medal
- Order of Merit of USA, Turkey, and Indonesia