• Past) Chairman, Depository Settlement Advisory Committee, Korea Securities Depository (2019~2021)
• Past) President, Korea Securities Law Association (2015~2017)
• Past) Chairman, Securities-related Diagnostic Litigation Act Amendment Committee, Ministry of Justice (2013~2015)
• Past) Member, Sanction Review Committee, Financial Supervisory Service (2012~2014)
• Past) Member, Capital Market Subcommittee, Financial Development Council, Financial Services Commission (2011~2013)
• Past) Law Firm Yulchon (2011~2024)
• Past) Member, Securities Subcommittee, Financial Development Review Committee, Ministry of Finance and Economy (2007~2008)
• Past) Member of the Committee on Enactment of an Act on Special Cases Concerning the Commercial Act, Ministry of Justice (2007~2008)
• Past) Member of the Coordination Committee for Commercial Act Issues, Ministry of Justice (2006~2007)
• Past) Member, 48th Judicial Examination (Commercial Law) (2006)
• Past) Chairman, Regulatory Review Committee, National Police Agency (2005~2015)
• Past) Professor, Sungkyunkwan University College of Law, Graduate School of Law (Corporate Law, Securities Law) (2005-2010)
• Past) Auditor, Seoul District Bar Association (2005~2006)
• Past) Mediator, Seoul Central District Court (2004~2006)
• Past) Securities Dispute Mediator, Korea Securities and Futures Exchange (2003~2006)
• Past) Outside Director, KB Asset Management (2003~2006)
• Past) Member of the Securities and Futures Investigation Review Committee Securities and Futures Commission (2002~2004)
• Past) Securities Dispute Mediator, Korea Exchange (2001~2003)
• Past) Bankruptcy Trustee of Korea General Financial (2001~2002)
• Past) Outside Director, Infobank (2000~2005)
• Past) Policy Evaluation Committee Member, Korea Fair Trade Commission (2000~2003)
• Past) Member of the Securities Investigation Review Committee, Financial Supervisory Service (2000~2002)
• Past) Receivership Trustee of Samsung Pharmaceutical (1998~1999)
• Past) Member, Securities System Advancement Committee, Ministry of Finance and Economy (1998~1998)
• Past) Lecturer, Judicial Research and Training Institute (Securities and Exchange Act) (1998~2005)
• Past) Member of the Administrative Appeals Committee, Seoul Metropolitan Police Agency (1998~2000)
• Past) Member of the Police Reform Committee, National Police Agency (1998~2000)
• Past) Consulting Attorney, Ministry of Construction and Transportation (1996~2000)
• Past) Member of the Selection Committee of Telecommunications Carriers, Ministry of Information and Communication (1996~1997)
• Past) Managing Partner, Nara (1996~2005)
• Past) Research Scholar, University of Washington, School of Law (1993~1995)
• Past) Attorney at Kim, Chang & Lee (1983)
• Current) Member of the Advisory Committee, Korea Listed Companies Association
• Current) Member of the Advisory Committee, KOSDAQ Association
• Current) Arbitrator, Korean Commercial Arbitration Center
• Current) Chairman, Securities Settlement Advisory Committee, Korea Securities Depository
• Current) LIN