•Chapter Chair, Subcontracted Workers' Chapter, Hwaseong Local, Kia Motors Branch, Korean Metal Workers' Union (KMWU)
•23-day Hunger Strike against illegal labour dispatch /faced 0.5billion KRW damage claims
•Chair, KCTU Kyeong-gi Regional Branch

•Chair, KCTC Branch, Air& Sea Port Division, Korean Public Services and Transport Workers’ Union (KPTU)
•Vice Chair, KCTU Busan Regional Branch
•Chair, Air& Sea Port Division, KPTU

•First Vice Chair, KCTU Gwangju Regional Branch
•General Secretary, KCTU Gwangju Regional Branch
•Executive Director, Planning Department, KCTU

•Chair, Reunification Committee, KCTU
•Vice President, KCTU
•Chair, Social Solidarity Committee, KCTU

•Policy Director, Kia Motor Branch, KMWU
•Captain, National Workers’ Brigade for Reunification
•Vice President, KMWU

•Chair, Maintenance Local, Kia Motor Branch, KMWU
•Vice President, KCTU
•Chair, Executive Committee, National Coalition for Free Medical Care

•Chair, Kyeong Nam Regional Branch, KMWU
•Co-chair, Shipbuilding Industry Trade Unions' Solidarity (SITU Solidarity)
•Vice President, KMWU

•Chair, Suwon Regional Branch, Court Division, Korean Government Employees’ Union (KGEU)
•Chair, Court Division, KGEU
•President, KGEU

•Chapter Chair, Subcontracted Workers' Chapter, Hyndai Motor Asan Plant Local, Korean Metal Workers' Union (KMWU)
•imprisoned in the struggle seeking justice for subcontracted worker RYU, Ghi-hyeok who committed self-immolation
•Vice President, KMWU

•Vice President, National Education Irregular Workers Union
•Chair, OSH Committee, National Education Irregular Workers Union
•Member, Cheong-Gye Apparel Labor Union

•Member, Kia Motor Irregular Workers’ Local, KMWU
•Vice President, KCTU
•Chair, Political Committee, KCTU