A former Navy Judge Advocate, Special Assistant United States Attorney and First Assistant District Attorney, Dennis has experience in a wide array of criminal and civil litigation as well as appellate matters. He has tried both criminal and civil cases nationwide, including more than 200 jury trials, and has represented service members worldwide.

Dennis represents individuals and organizations being investigated for or charged with white-collar offenses, such as:

Money laundering allegations
Fraud charges
Internal investigations
Transnational crime
Health care fraud
Controlled substance and pharmaceutical offenses
Federal theft and computer charges
Antitrust and trade secrets
International criminal law
Foreign Corrupt Practices Act

One area of particular interest to Dennis is the imposition of sanctions upon nations, corporations and individuals under U.S. law. These sanctions are administered by the U.S. Department of the Treasury and the Office of Foreign Assets Control (OFAC). Dennis has represented multiple companies in compliance related issues involving OFAC and the Specially Designated Nationals List (SDN) and has spoken frequently on the issue of sanctions throughout the United States, Europe, the Middle East and Latin America.

Additionally, Dennis handles a variety of civil litigation matters, including federal statutory causes of action such as the False Claims Act, antitrust, trade secrets, Racketeering Influenced Corrupt Organizations Act (RICO), civil rights violations, allegations of fraud and international litigation.