John G.E. Marck

John G.E. Marck began his career as an Assistant District Attorney in New York City, serving in both the Brooklyn and Bronx District Attorney’s offices. As an ADA, Marck prosecuted a high-volume caseload of major felonies, including murder, manslaughter, robbery, and gang assault. Following his time in the Homicide Bureau of the Bronx District Attorney’s Office, he entered the Department of Justice as an AUSA in the Corpus Christi and Victoria Divisions of the Southern District of Texas, where he managed a diverse criminal docket that included charges of illegal reentry following deportation, alien smuggling, drug trafficking, and other cartel-related offenses.

Marck continued his federal prosecution career in the National Security and Public Corruption Section of the Southern District of Texas, where he was promoted to Associate Deputy Criminal Chief and supervised a team of AUSAs, intelligence officers, and support staff in prosecuting complex national security, counterintelligence, and cybercrime cases.

Marck holds a bachelor’s degree from Brooklyn College and a law degree from St. John’s University School of Law.