Mr. Gwang Soo OH is a managing partner at D&A LLC. His practice is primarily focused on Criminal & Compliance, Corporate, Finance & Restructuring, Construction & Real Estate, Reconstruction & Redevelopment, Environmental, Social & Governance (ESG), the Serious Accidents Punishment Act, Blockchain, and Investigations.

During his 26-year prosecutorial career, Mr. Oh held various key positions, including Chief Prosecutor of the Central Investigation Division 2 at the Supreme Prosecutors’ Office, Departmental Chief Prosecutor of the Special Investigation Division 2 at the Seoul Central District Prosecutors’ Office, Chief Prosecutor of the Ansan Branch at the Suwon District Prosecutors' Office, Chief Prosecutor of the Cheongju District Prosecutors’ Office, and Chief Prosecutor of the Daegu District Prosecutors’ Office. Since the establishment of the ESG & Serious Accident Advisory Group in 2021, he has served as its co-head, overseeing advisory services related to ESG and serious accidents. Notably, he is also widely recognized as a leading investigative expert, having led numerous high-profile investigations as the head of the Criminal & Compliance Group (formerly the Investigation Defense Group).

Bar Admissions

• Admitted to Bar, Korea (1989)

Education

• Sungkyunkwan University Law School (PhD, 2009)
• Sungkyunkwan University (LLB, 1987)
• Jeonju High School (1979)

Significant Accomplishments

• Senior Secretary to the President for Civil Affairs (June 2025)
• D&A LLC (2020-Present)
• Managing Partner, Law Firm Inwol (2018)
• Oh Kwang Soo Law Office (2016)
• Director General, Crime Prevention Policy Bureau, Ministry of Justice (2015)
• Chief Prosecutor, Daegu District Prosecutors’ Office (2013)
• Chief Prosecutor, Cheongju District Prosecutors’ Office (2013)
• First Deputy Chief Prosecutor (Chief Prosecutor), Daegu High Prosecutors’ Office (2012)
• Research Fellow, Institute of Justice (2011)
• Chief Prosecutor, Ansan Branch of Suwon District Prosecutors' Office (2010)
• Deputy Chief Prosecutor, Seoul Western District Prosecutors' Office (2009)
• Second Deputy Chief Prosecutor, Busan District Prosecutors' Office (2009)
• Chief Prosecutor, Seosan Branch of Daejeon District Prosecutors' Office (2008)
• Departmental Chief Prosecutor, Special Investigation Division 2, Seoul Central District Prosecutors' Office (2007)
• Chief Prosecutor, Central Investigation Division 2, Supreme Prosecutors’ Office (2005)
• Departmental Chief Prosecutor, Special Investigation Division, Incheon District Prosecutors’ Office (2004)
• Practical Investigation Training, Brooklyn District Attorney’s Office, New York, U.S.A. (2003)
• Deputy Departmental Chief Prosecutor, Special Investigation Division, Seoul District Prosecutors’ Office (2002-2004)
• Chief Prosecutor, Haenam Branch of Gwangju District Prosecutors' Office (2001-2002)
• Deputy Departmental Chief Prosecutor, Seongnam Branch of Suwon District Prosecutors’ Office (Dispatched to the Central Investigation Division, Supreme Prosecutors’ Office, 2001)
• Research Prosecutor, Supreme Prosecutors’ Office (1999-2001)
• Prosecutor, Daejeon District Prosecutors’ Office (Dispatched to the Central Investigation Division, Supreme Prosecutors’ Office, 1997-1999)
• Prosecutor, Suwon District Prosecutors’ Office (Dispatched to the Central Investigation Division, Supreme Prosecutors’ Office, 1995-1997)
• Prosecutor, Seoul District Prosecutors’ Office (1993-1995)
• Prosecutor, Ganggyeong Branch of Daejeon District Prosecutors’ Office (1991-1993)
• Prosecutor, Busan District Prosecutors’ Office (1989-1991)
• Judicial Research and Training Institute of the Supreme Court of Korea (1989)

Professional Activities and Experience

• Overseas Investment / Foreign Investment / Project Legal Advisory
• |N|- Acted as legal advisor for large domestic companies and small & medium-sized enterprises (SMEs) in establishing overseas subsidiaries, branches and liaison offices.
• |N|- Acted as legal advisor for large domestic companies and small & medium-sized enterprises (SMEs) in establishing joint venture and successfully advised with regard to the acquisition of business licensing (Germany, England, China, Taiwan, Indonesia and Malaysia.)
• |N|- Acted as legal advisor for numerous foreign companies in establishing subsidiaries and acquiring business licensing in Korea.
• |N|- Acted as legal advisor for domestic private equity firms, banks and securities companies related to the investments in foreign companies or funds.
• |N|- Acted as legal advisor for foreign investors and successfully advised in relation to the acquisition and divestment of shares (including block deals) in Korean listed companies and related disclosure matters.
• |N|- Acted as legal advisor for various domestic and international M&A transactions, including the sale of tank terminals by a large domestic company, the acquisition of overseas assets and operations, the sale of a domestic business division of foreign-based chemical company, the acquisition of a domestic company by Italian textile company, the acquisition of foreign school in Korea, the sale of overseas Solar PV power plant and sales of domestic solar power and wind power projects.
• |N|- Acted as legal advisor on various projects including establishing a U.S. factory for a domestic secondary battery component company and assisting a domestic state-owned power facility with overseas power plant construction project and business expansion.
• |B|
• Dispute / Litigation
• |N|- Managed various disputes between domestic companies and overseas distributors, as well as disputes related to joint ventures.
• |N|- Represented a domestic bank in litigation in China and in Korea concerning a letter of credit.
• |N|- Represented an overseas investment company in a dispute related to the delisting of an offshore company listed in Korea.
• |N|- Represented a domestic securities company in relation to violations of the Capital Market Act concerning their offshore bonds.
• |N|- Managed various litigation and international arbitration cases involving equipment supply and brand royalties, etc.
• |N|- Managed various cross-border litigation and government investigation support work for domestic companies in assisting with the complex document review and discovery process.

• A Study on the Protection of Fundamental Rights in Criminal Procedure under the U.S. Constitution (2004)