Hae Sung’s area of practice is M&A, private equity as well as corporate litigations involving leveraged buyouts, and corporate governance matters. He worked as a full-time visiting lawyer at GS Energy, a diversified holding company of GS Group, one of the biggest Korean conglomerates, advising on its numerous acquisitions and divestitures. He also worked at the New York office of Sullivan & Cromwell as a Visiting Lawyer. He has represented many international and domestic financial investors, as well as Korean conglomerates in a wide range of M&A transactions and regulatory matters.
Publications
Co-author of the South Korea chapter in the Global M&A Law Guide , published 28 April 2026 , alongside Michael Chang and Stephanie Kim .