Mark is an antitrust lawyer and a business litigator. His antitrust practice includes representing clients on filings under the Hart-Scott-Rodino (HSR) Act and similar “merger control” laws around the world, investigations before the U.S. Department of Justice and Federal Trade Commission, and civil antitrust litigation, including class actions. He also represents clients in complex commercial litigation in state and federal trial and appellate courts across the country, and he has represented companies and individuals facing criminal inquiries and investigations.

Mark also actively participates in the firm’s pro bono practice, including arguing appeals before the U.S. Court of Appeals for the Sixth Circuit.

Prior to joining Thompson Hine, Mark clerked at the New York Court of Appeals, the state’s highest court, and was an extern at the United States Attorney’s Office, Northern District of New York.

  • Included in the inaugural edition of Best Lawyers: Ones to Watch 2021 for Commercial Litigation
  • Selected for inclusion in Rising Stars by Ohio Super Lawyers magazine, 2019-2020
  • Champion and Best Final Round Advocate, Mackenzie Hughes Edmund H. Lewis Appellate Competition
  • Excellence Award, New York State Academy of Trial Lawyers
  • CALI Excellence for the Future Awards: Appellate Advocacy, Constitutional Law, Constitutional-Criminal Procedure, Evidence and Legal Writing
Professional and Civic

Professional Associations

  • American Bar Association, Antitrust Section; Research Editor, Antitrust Law Journal
  • Federal Bar Association, Northern District of Ohio Chapter
  • Leukemia & Lymphoma Society, Northern Ohio Chapter, Young Professionals Board