- Passed the 24th Judicial Examination
- Judge, Daegu District Court
- Judge, Seoul High Court
- Judge, Daegu High Court
- Head of Andong Branch, Daegu District Court
- Head Judge, Seoul Central District Court
- Chief Judge, Seoul Northern District Court
- Standing Commissioner, National Unification Advisory Council
- Member of North Korean Human Rights Committee, Korean Bar Association
- Non-standing Commissioner, National Special Investigation Committee on Sewol Ferry Disaster

- Passed in 26th Bar Examinantion(1984)
- Professor, Ph.D., The Law School, Hanyang University
- President, Human Rights Law Society
- Member, Investigation Policy Committee, National Police Agency
- Member, Police Reform Commission, National Police Agency
- Commissioner, Seoul Metropolitan Human Rights Commission
- Board member, Human Rights policy Institute
- Vice Chairman, Human Rights Committee, Korea Bar Association
- Director General of Human Rights Policy Bureau, National Human Rights Commission of Korea
- Member, Policy Advisory Committee, National Human Rights Commission of Korea
- Member, Policy Committee for Foreigners under Prime Minister
- Chairman, International Solidarity Committee, Lawyers for a Democratic Society
- Partner lawyer, Law Office Shinhwa

- Secretary General, MINKAHYUP Human Rights Group
- Director, Communications & Cooperation Div. of NHRCK
- Director, Human Rights Education for Citizens, NHRCK
- Director, Human Rights Policy Institute
- Standing Director, Korea Democracy Foundation