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Recently reviewed Professionals
Giusung Oh is an antitrust and competition law expert providing comprehensive legal services across every stage of antitrust and competition law matters, from responding to Korea Fair Trade Commission (KFTC) investigations, KFTC deliberation proceedings, and administrative litigation, to handling civil and criminal litigation.

Drawing on his extensive experience as a judge and later as Director General of the Adjudication Management Bureau and Non-Standing Commissioner at the KFTC, Mr. Oh excels at accurately identifying key issues and developing effective defense strategies at both the KFTC deliberation stage and in subsequent administrative litigation.

Mr. Oh also brings substantial litigation experience from his years as a judge and presiding judge at courts throughout Korea. Based on this background, he represents and advises companies in a broad range of civil, criminal, and administrative disputes.
Education
2021 Graduate School, Korea University – Ph.D. in Competition Law
2012 UCLA School of Law – LL.M.
2005 Graduate School, Seoul National University – LL.M.
2004 Judicial Research & Training Institute, Supreme Court of Korea
2001 Seoul National University – LL.B.
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Work Experience
2026-Present Lee & Ko
2024-2026 Non-Standing Commissioner, KFTC
2024-2026 Managing Partner, Good Plan Law Firm
2023-2024 Senior Administrative Officer, Legal Affairs Secretariat, Office of the Senior Secretary for Civil Affairs, Office of the President of the Republic of Korea
2022-2023 Kim & Chang
2020-2022 Director General for Case Management, KFTC
2019-2020 Presiding Judge, Changwon District Court
2017-2019 Research Fellow, Judicial Policy Research Institute
2017-2019 Judge, Seoul Central District Court
2015-2017 Judge, Seoul Western District Court
2011-2015 Judge, Goyang Branch, Uijeongbu District Court
2008-2011 Judge, Chuncheon District Court
2006-2008 Judge, Seoul Western District Court
2004-2006 Associate Judge, Seoul Central District Court
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Admissions & Qualifications
2004 Admitted to the Korean Bar
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Languages
Korean and English
Publications / Presentations / ETC
강원도 지방토지수용위원회 위원(2024-현재)
한국자산관리공사 계약심의위원(2022-2023)
공정거래조정원 ‘기업실무자를 위한 담합 교육’ 담당(2025)
공정경쟁연합회 ‘공정거래법상 시장지배적 지위 남용 행위’ 강의(2023)
한국인터넷기업협회 ‘온라인플랫폼 규제 동향 국제세미나’ 토론(2023)
디지털자산 컨퍼런스 ‘가상자산 시장의 거래 특성 및 시장 획정’ 토론(2023)
형법 주해(공저, 2023, 박영사)
미국 해외부패방지법(FCPA)에 관한 연구(2018, 사법정책연구원)
미국의 소각하에 관한 연구(2017, 사법정책연구원)
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