Matthew C. Sullivan

A former federal prosecutor, Matthew Sullivan defends corporate and individual clients facing government investigations, enforcement actions, sensitive internal investigations, and complex civil litigation.

Matthew has a wealth of experience representing pharmaceutical companies, medical device manufacturers, and universities in federal and state government investigations, internal investigations, and civil False Claims Act litigation, involving promotional practices, pricing, billing, and recalls. He has conducted numerous internal investigations in the life sciences and telecommunications/technology sectors, including on behalf of clients subject to corporate compliance monitorships.

His cross-border investigations experience has spanned six continents. Such investigations include matters implicating the Foreign Corrupt Practices Act and U.S. export control and sanctions laws, involving the Department of Justice, the Department of Commerce's Bureau of Industry and Security (BIS), and the Department of Treasury's Office of Foreign Assets Control (OFAC).

Matthew also has experience with insider trading, market manipulation, and other securities matters, and he has represented multiple individuals in investigations conducted by the Department of Justice, the Securities Exchange Commission, and other enforcement authorities.

Previously, Matthew served as an Assistant U.S. Attorney for the District of Maryland, prosecuting dozens of cases at the investigation, trial, and appellate stages. He led multiple federal wiretap investigations, conducted lengthy grand jury investigations, and prosecuted cases involving fraud, international narcotics conspiracies, and money laundering.

Early in his career, Matthew also served as a law clerk to the Honorable Ellen L. Hollander of the U.S. District Court for the District of Maryland and in the Criminal Appeals Division of the Maryland Office of the Attorney General.