Gregg Marmaro is Counsel in the Los Angeles office of White & Case and a member of the Firm's Commercial Litigation and Global White Collar Practice Groups. Gregg is a former federal prosecutor with significant litigation and trial experience and an extensive background in handling high-stakes civil and criminal matters.

From 2019 to 2025, Gregg served as an Assistant United States Attorney in the Criminal Division of the United States Attorney's Office for the Central District of California, where he served as the lead or co-lead prosecutor on numerous jury and bench trials and supervised dozens of grand jury investigations. In the Major Frauds section, Gregg prosecuted a wide range of financial crimes, including a complex money laundering scheme targeting elderly victims, one of the largest fraud cases in the SBA's history, and a securities fraud case with a parallel SEC enforcement action.

Earlier in his tenure, Gregg investigated and prosecuted complex organized crime cases, international narcotics conspiracies, and violent crimes, including violations of the Racketeer Influenced Corrupt Organizations (RICO) Act. For his work with the Department of Justice, Gregg received numerous awards and recognitions from federal law enforcement agencies, including from the FBI, IRS-Criminal Investigations, Homeland Security Investigations, and ATF.

Before working as a federal prosecutor, Gregg practiced for four years at an international law firm in New York, where he represented clients in complex commercial litigation, white collar matters, and internal investigations. He clerked for the Honorable Patty Shwartz on the U.S. Court of Appeals for the Third Circuit.

Gregg received his Bachelor of Arts degree cum laude in Economics from Bucknell University. He received his law degree from New York University School of Law.