Mathew S. Rosengart is an American lawyer. He is a former federal prosecutor and Trial Attorney for the United States Department of Justice. Rosengart is known for representing high-profile clients, including Steven Spielberg, Sean Penn, Julia Louis-Dreyfus, Kenneth Lonergan, Eddie Vedder, Jimmy Butler, Sandton Capital Partners, Verizon, and Facebook. He is considered a "go to" litigator for Hollywood's elite and corporate America.
https://en.wikipedia.org/wiki/Mathew_Rosengart