Deputy Secretary-General, National Assembly Secretariat (2018-2019)
Chief of Staff, Special Committee on Budget and Accounts, National Assembly Secretariat (2017-2018)
Chief of Staff, Land Infrastructure and Transport Committee, National Assembly Secretariat (2015)
Director, Budget Analysis Department, National Assembly Budget Office (2013)
Deputy Chief of Staff and Director, Special Committee on Budget and Accounts, National Assembly Secretariat (2012)
Director, Working-Level Planning Group, Seoul G20 Speakers’ Consultation (2010)
Director, International Affairs and Protocol Bureau, National Assembly Secretariat (2009-2012)
Chief Legislative Research Officer, Culture, Sports and Tourism Committee, National Assembly Secretariat (2009)
Minister-Counselor, Embassy of the Republic of Korea, USA (2006-2009)
Legislative Research Officer and Deputy Director, Public Administration and Security Committee, National Assembly Secretariat (2005-2006)
Legislative Research Officer and Deputy Director, Agriculture, Food, Rural Affairs, Oceans and Fisheries Committee, National Assembly Secretariat (2001-2005)
Secretary in Charge of Bills, Proceedings Bureau, National Assembly Secretariat (1996-1999)
Legislative Research Officer, Agriculture, Food, Rural Affairs, Oceans and Fisheries Committee, National Assembly Secretariat (1993-1996)
Legislative Research Bureau, National Assembly Secretariat (1990-1993)
Passed the Legislative Higher Civil Service Examination (1990)