Seong Hong Partner
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  • TEL 82 2 6003 7792
  • FAX 82 2 6003 7027
  • E-MAIL
Seong Hong is a partner at Yoon & Yang LLC. His main practice area is employment & labor law.
Mr. Hong provides various forms of legal advice as well as representations in litigations in respect of employment & labor and HR areas, including corporate management system and human resources management, corporate management of non-regular workers (in-house subcontracting, illegal dispatch, fixed term law), enactment and amendment of employment regulations and collective agreements, workplace harassment and sexual harassment compliance, labor inspection, and responses to the Ministry of Employment and Labor. He has also been demonstrating unparalleled sophistication in compliance matters in relation to responding to industrial accidents and the Act on Punishment for Serious Accidents. He is currently serving as a regular member of the Labor Law Forum at the Supreme Court of Korea, as well as the Society of Labor Law Theory and Profession.


  • 2009-present Yoon & Yang LLC
  • 2011-present Member, Labor Law Forum, Supreme Court
  • 2018-present Member (Director), Society of Labor Law Theory and Profession
  • 2008-09 Public Service Advocate, National Advocacy Department, Ministry of Justice
  • 2006-08 Public Service Advocate, Busan High Prosecutors’ Office


  • 2014 University of Southern California Gould School of Law, LL.M.
  • 2008 Korea University Graduate School of Law (coursework completed)
  • 2006 Judicial Research and Training Institute
  • 2004 Korea University College of Law, LL.B.

Representative Matters

  • Advised Company S (semi-conductor) and Company K (automobile manufacturing) on the process of performance competency management of low-performing individuals
  • Advised and inspected Company C (game), Company K (game), and Company S (securities) in respect of sexual harassment and workplace harassment
  • Advised Company H (IT) and Company Y (automobile engine manufacturing) on collective labor relations
  • Advised Company I (IT) and Company E (retail) on the response to labor inspection
  • Advised Company S (manufacturing), Company S (construction), Company H (logistics), and several other corporations on the response to the Act on Punishment for Serious Accidents and provided legal consulting thereof
  • Represented and advised Company L (IT), and Company G (manufacturing) on the case of a violation of Occupational Safety and Health Act
  • Advised Company V (heavy machinery manufacturing) and Company S (semi-conductor) on the risk of in-house subcontracting and illegal dispatch
  • Represented Construction H, Company H (manufacturing), and several other corporations in illegal dispatch litigation cases
  • Advised Company A (airline) and Company L (retail) on M&A and labor relations
  • Advised Company H (automobile sales) on layoff
  • Advised Company K (bank) on a management plan for non-regular workers
  • Represented Company M (insurance) and Company S (manufacturing) in Ministry of Employment and Labor cases
  • Represented Company P (confectionary), Company S (manufacturing), and several other corporations in ordinary wage litigation cases


  • Leading Individual, Employment, Chambers and Partners Asia-Pacific (2024)
  • Next Generation Partners, Labour and Employment, Legal 500 Asia-Pacific (2020-2024)
  • Future Star, Labor and employment, Benchmark Litigation Asia-Pacific (2022-2023)
  • Best Lawyer, Serious Accidents, Korea Economic Business (2023)


  • Two Years into the Enforcement of Serious Accidents Punishment Act: Recent Trends and Implications, Journal Vol. 91 No. 1, AMCHAM Korea (Co-author, 2024)
  • The Implication of the Korean Supreme Court’s En Banc Decision on Abandoning the legal Principles of "Reasonable under the Social Norms", Journal Vol. 90 No. 4, AMCHAM Korea (Co-author, 2023)
  • Controversies and Prospects on Liabilities for Damages Arising from Unlawful Industrial Actions, Journal Vol. 90 No. 3, AMCHAM Korea (Co-author, 2023)
  • Korea Chapter, Occupational Health & Safety, Lexology Getting the Deal Through, Law Business Research (Co-author, 2022-2023)
  • South Korea: Law & Practice, Employment, Chambers Global Practice Guides (Co-author, Chambers and Partners, 2019, 2020, 2021)
  • The Necessity for the “52-hour” Weekly Working Hours and Policy Improvements, Korea Herald, 2018
  • Practical Issues on the Recognition of Workers’ Status for Commissioned Drivers, Labor Law, 201
  • Criteria for Differentiating Inter-Company Subcontract and Worker Dispatching, Labor Law, 2015
  • Obligations of Employment and Legal Fiction of Employment for Dispatched Workers, Labor Law, 2015
  • Validity and Legal Characteristics of Agreement on Return of Signing Bonus, Labor Law, 2015
  • Practical Issues of Requirements for Types and Legitimacy of Personnel Transfers, Labor Law, 2015
  • Key Issues on Benefits from Improper Dismissal Relief Program and Lawsuit, Labor Law, 2016
  • Case Review – Good Faith Decision on Ordinary Wage Dispute, Labor Law, 2016
  • Legal Issues on the Fairness Standards in Low Performer Assessment (Co-Author), Labor Law, 2016
  • Expanded Introduction of Performance-Based Annual Salary System and Rationality Theory from the Perspective of Common Sense, Labor Law, 2016
  • A Contractor’s Responsibility on the violation of the Occupational Safety and Health Act, Labor Law, 2016
  • Illegal Dispatch and the Scope of Damages for Compensation, Labor Law, 2016
  • Legal Suggestions on How to Solve the Delayed Payment of Wages Issues in Service Industries, Labor Law, 2018
  • Minimum Wages and the Changes of Salary System, Labor Law, 2018
  • Practical Issues of Presumed Work Hours System on the Labor outside Workplace, Labor Law, 2018
  • The Bargaining Channel Unification Procedure and the Bargaining Unit Separation System, Labor Law, 2019
  • The Positives and the Negatives of the Enactment of the Workplace Harassment Prevention Act, Labor Law, 2019