O’Melveny Worldwide

John J. Lapin is a litigation associate who specializes in white-collar defense, corporate investigations, and commercial litigation. John has represented clients in a range of industries in internal investigations as well as in enforcement actions brought by the Department of Justice, the Securities and Exchange Commission, and other federal and state agencies, including matters involving alleged violations of the Foreign Corrupt Practices Act (FCPA).

John has also contributed to a wide range of pro-bono matters, including for Whitman-Walker Health, the Innocence Project, the Brady Center, Global Citizen, the ACLU, the Asian American Legal Defense and Education Fund, and individuals seeking asylum in the United States.

Before joining O’Melveny, John clerked for two years for the Honorable Philip A. Brimmer, Chief Judge, US District Court for the District of Colorado, and was an associate at another international law firm.

Prior to law school, John served as a political appointee during the Obama Administration as the Senior Assistant to the Special Counsel at the US Office of Special Counsel.

Read More
  • Counseled Fortune 100 in a putative collective action under the Fair Labor Standards Act, concerning alleged non-payment of overtime, and obtained a complete denial of conditional certification
  • Represented a global pharmaceutical company in connection with a joint DOJ and SEC investigation of alleged violations of the FCPA
  • Represented a global index provider in a matter of first impression before the SEC
  • Advised national and international companies in internal and governmental investigations
  • Conducted anti-bribery and corruption-related due diligence assessments for national and international companies in advance of mergers and acquisitions
  • Developed governance, conflicts, and risk-management frameworks for directorships


Bar Admissions

  • District of Columbia
  • New York
  • Colorado


  • Georgetown University, J.D.: cum laude; Managing Editor, American Criminal Law Review; Pro Bono Pledge Honoree
  • Tufts University, B.A., Philosophy: summa cum laude

Professional Activities

Board Member 

  • The District of Columbia LGBTQ+ Bar Association


  • The Honorable Philip A. Brimmer, Chief Judge, US District Court for the District of Colorado


  • The Honorable Beryl A. Howell, US District Court for the District of Columbia
  • United States Attorney’s Office for the District of Columbia, Criminal Division, Fraud & Public Corruption Section


  • “The Legal Status of Conversion Therapy,” Georgetown Journal of Gender and the Law, 22(1):251 (2020)


  • “Corporate Criminal Liability,” American Criminal Law Review, 55(4):961 (2018) 
  • “The United States of America: Federal Whistleblower Protection,” Committing To Effective Whistleblower Protection, OECD Publishing (2016)