Hae Sung’s area of practice is M&A, private equity as well as major corporate litigations involving leveraged buy-outs 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 New York office of Sullivan & Cromwell LLP 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. His recent clients include SK Group, POSCO Group, GS Group, KDB Financial Group, among many others.

• MBK Partners and Youngpoong's tender offer for Korea Zinc
• Genesis PE's sale of waste management company to EQT PE
• Establishment of a joint venture between Alibaba and Gmarket
• LG Electronics' investment in and acquisition of Bear Robotics
• MBK Partners' acquisition of Nexflex
• SK E&S in its capital raise from KKR and sale of stake in Paju Energy Service
• KKR's acquisition of Medit and Airfirst
• Chubb in its acquisition of LINA Life Insurance of Korea
• Q Capital PE’s acquisition of Chorokbaem Media
• GS Energy in its acquisition of GNTEL, GS Connect, ChargeEV, Incheon Total Energy
• Well to Sea PE’s acquisition of SI Flex, GSC, Shinil Global, and Wellang, and sale of Aju Capital (now Woori Financial Capital) and HSD Engine
• GIC in its potential investment in Starbucks Korea
• Baring PE (now EQT)’s investment in and exit from Shinhan Financial Group
• JKL PE's sale of Panaxetech, and investment in Thira-Utech, Sama Aluminium, and DSEV
• GIG (Macquarie)’s fundraising for offshore wind projects from Total and SK ecoplant
• Danggeun Market’s fundraising from foreign financial investors
• Heimdall PE’s equity investment in a subsidiary of Hanwha Solutions and in Foosung Global
• Sequoia and GIC in their investment in Woowa Brothers
• Sequoia, DST and Aspex in their investment in Kurly
• Sale of a controlling stake in Koramco REITs Management and Trust
• Blackstone PE in its investment in Simone
• Hahn & Co. in its acquisition of POSFINE
• S1 in its acquisition of real estate management service business from Samsung Everland