Mark C. Grundvig


Mark Grundvig, a former federal prosecutor with the U.S. Department of Justice (DOJ), focuses his practice on antitrust investigations and litigation, white collar criminal defense and litigation, government investigations, corporate compliance, and congressional investigations as a partner in Foley’s Antitrust & Competition Practice Group.

Prior to Foley, Mark served nearly 25 years with the DOJ, most recently as Assistant Chief in the Washington Criminal II Section of the Antitrust Division. As Assistant Chief, Mark oversaw investigations and prosecutions of criminal violations of federal laws relating to competition matters, including price fixing, bid rigging, customer allocation, and fraud. Mark additionally supervised investigations and litigation handled by the office and provided training, direction, guidance, and approval on investigative plans, litigation strategy, plea resolutions, leniency applications, compliance proposals, and outreach efforts. He regularly coordinated with foreign jurisdictions and domestic agencies on case-related matters and served as a senior trial attorney for the Antitrust Division.

While Mark’s experience at the DOJ encompassed a wide range of enforcement actions across a broad range of industries, significant focuses of his were criminal antitrust enforcement in the health care industry, international cartel enforcement and the transportation industry, government procurement enforcement, corporate compliance, and leniency investigations.

Earlier in his career, Mark spent two years working on the Senate Judiciary Subcommittee on Antitrust, Competition Policy, and Consumer Rights, examining various competition issues.


  • Federal Bar Association, Antitrust and Trade Regulation Section
  • Financial Chair (2021-2022)
  • Membership Chair (2022-2023)
  • Reuben Clark Law Society


  • Speaker, White-Collar Crime Workshop, Embassy of Japan, Washington, D.C. (October 2023)
  • Moderator, Antitrust Division Roundtable on ACPERA, Litigated Issues & Challenges (2019)
  • Speaker, Japanese Business Society Detroit (2017)
  • Visiting Instructor, Comisión Federal de Competencia Económica, Mexico City (2016)
  • Speaker, Virginia Bar Association Summer Meeting, Individual Accountability (2016)
  • Speaker, International Competition Network Cartel Workshop in Taipei, Taiwan (2014)
  • Participant, International Competition Network Cartel Workshop in San Salvador, El Salvador (2007)

Awards & Recognition

  • Antitrust Division, Hugh P. Morrison Award in recognition of long-term achievement and exemplary work ethic of a career litigator and litigation manager (2021)
  • Assistant Attorney General Award of Distinction (2018, 2022, 2023)