Michael Jo


  • JD, cum laude, New York University School of Law, 2010; Robert MacKay Scholar; New York University Law Review , Articles Editor
  • PhD, Yale University, 2007
  • BA, cum laude, Yale University, 1998


  • New York, 2012
  • Honorable Leonard B. Sand, U.S. District Court for the Southern District of New York (2010 - 2011)

Michael Jo


Michael, an associate in Ropes & Gray’s Government Enforcement practice group, counsels clients in a wide range of government and internal investigations, with a particular focus on antitrust enforcement. He represents a number of companies and executives in international investigations by the DOJ’s Antitrust Division, and clients in multidistrict antitrust class action litigation. Michael has also represented companies and individuals in investigations involving the SEC, FDA, state attorneys general, and other government agencies.

Michael has represented clients in a wide range of data security and privacy matters, including data security breaches and consumer privacy class actions. He has worked on forensic data security investigations, claims brought by credit card brands and financial institutions, and subsequent civil litigation.

In his pro bono practice, Michael has represented individual clients and non-profit organizations in cases involving constitutional, family, and immigration law; the Freedom of Information Act; prisoners’ rights; and amicus curiae briefs filed with the United States Supreme Court and the New York State Court of Appeals.

Prior to joining Ropes & Gray, Michael clerked for the Honorable Leonard B. Sand of the United States District Court for the Southern District of New York; worked as a legal assistant in the Manhattan District Attorney’s Office; earned a Ph.D. with fellowships from the Social Science Research Council and the Smithsonian Institution; and taught at Yale University and Boston University.


  • Representing several senior executives and Japanese multinational company in a global criminal investigation of alleged collusion among Japanese auto parts manufacturers.
  • Representing a senior executive of a major international medical device manufacturer in a criminal investigation being conducted by the DOJ and the FDA.
  • Represented a Japanese multinational capacitor company in connection with a DOJ criminal antitrust investigation, resulting in closure of the investigation by the DOJ, and in associated civil antitrust litigation.
  • Successfully represented two executives of multinational Japanese auto parts manufacturers in connection with DOJ criminal antitrust investigations.
  • Represented a major international retailer in a putative class action brought by financial institutions stemming from a data security breach announced in 2013.
  • Represented a major international retailer in the ongoing defense of card brand claims in connection with a data security breach announced in 2010.
  • Assisted a leading investment management firm in internal investigations; responding to inquiries from the SEC and CFTC; and private litigation involving residential mortgage-backed securities.
  • Successfully assisted international consumer retail company in response to an informal SEC inquiry that resulted in no action being taken.



  • Co-speaker, “Extradition of Japanese Nationals: A Growing Threat in U.S. Prosecutions of International Cartels?” Ropes & Gray Tokyo Morning Briefing (March 2015)