1968 graduated from gyeonggi high school.

1973 graduated from the 29th session of the Army NCO School 1977 graduated from the German Department of Xijiang University (entrusted education).

1982 graduate student of yonsei university school of management (dropout)

1984 ~ 15 captain of 26th artillery brigade.

1989 ~ Assistant to the Speaker of the Senate

199 1 ~ Battalion Commander, Artillery Battalion, Eighth Division

1993 ~ 56 division chief of staff

1995 ~ Chief, War Planning Section, Strategic Planning Department, Joint Staff

1996 ~ Minister of Defence, Chief Office of Foreign Affairs and Security, Cheongwadae.

1997 ~ brigade commander of artillery brigade of the 6th Army Corps

1998 ~ Assistant Secretary of Defense

2000 ~ 23 rd Infantry Division Commander

2002-present Director, Planning Management Office, Army Headquarters

2003-Director, Policy and Planning Department, Ministry of Defence

2004-Commander of the Capital Defence

2005-Minister of Joint Operations

2006 ~ 1 commander of field army

2008.3.28 ~ 2009.9 Speaker of the Joint Staff Headquarters

September 3-20, 200910.11Minister of National Defense