Matthew L. Mazur


Matthew L. Mazur


New York | 1095 Avenue of the Americas, New York, NY 10036-6797
+1 212 649 8791 | +1 212 698 3599

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Matthew L. Mazur is a Partner in the White Collar and Securities Litigation Group. His practice focuses on the representation of individuals and companies in criminal and regulatory investigations, enforcement proceedings, internal investigations, and related litigation. He also has significant experience in complex commercial litigation in federal and state courts, as well as commercial arbitrations.

Prior to joining Dechert, Mr. Mazur served as a staff attorney at both the Public Defender Service for the District of Columbia and the Office of the Appellate Defender in New York City. He has been lead counsel or co-counsel in over twenty jury trials and bench trials, and he has briefed and argued over twenty appeals before the New York Court of Appeals, the Appellate Division of the New York Supreme Court, and the United States Court of Appeals for the Second Circuit.

In 2015, Mr. Mazur was recognized as a “Rising Star” by the New York Law Journal, placing him among a select group of lawyers under age 40 who have established a record of accomplishments, as well as demonstrated that they are top contributors to the practice of law and their communities. Super Lawyers, a publication of Thompson Reuters, has also selected Mr. Mazur as a Top Rated White Collar Crimes Attorney in 2017, following his selection as a  “Rising Star” in white collar criminal defense in each of 2014, 2015, and 2016.

Mr. Mazur serves on the Board of Trustees of the Neighborhood Defender Service of Harlem, a community-based public defender serving residents of Upper Manhattan. He also regularly provides pro bono representation to indigent men and women in criminal matters in federal and state court. In March 2015, he won a complete acquittal after a two-week jury trial for a pro bono client charged with armed robbery in Queens Supreme Court. In November 2016, he won another complete dismissal of child abuse allegations after a bench trial for a pro bono client in the New York Family Court. 


Significant Representations

  • Jon S. Corzine, former Governor of New Jersey, U.S. Senator, and CEO of MF Global, in investigations by the Department of Justice (DOJ), the Securities Exchange Commission (SEC), the Commodity Futures Trading Commission (CFTC), the Financial Industry Regulatory Authority (FINRA), and the U.S. Congress, as well as all related civil litigation.
  • Microsoft Corp. in litigation against Samsung Electronics Corp. and Acacia Research Corp. in the United States District Court for the Southern District of New York.
  • CEO of a multinational financial services firm in connection with SEC investigation into valuation of private equity investments.
  • Broker-dealer and employees in SEC investigation of trading activity and net capital.
  • Senior broker in antitrust investigation by DOJ and U.K. Financial Conduct Authority.
  • Tax lawyer at Swiss bank in DOJ investigation.
  • 12 police union officials charged with ticket-fixing in New York State Supreme Court.
  • Boutique investment bank in investigation by the New York District Attorney’s Office involving suspected misappropriation of trade secrets.
  • Special board committee in internal investigation into bribery allegations against CEO.
  • Credit union in internal investigation of alleged misconduct by CEO.
  • U.K. manufacturer in the Southern District of New York in breach of contract action by a U.S. distributor.
  • Sellers of a family business in the Commercial Division of the New York State Supreme Court against the buyer’s allegations of fraud.
  • Investment adviser in commercial arbitration brought by former marketing agent.
  • Hedge fund in commercial arbitration brought by retired partner.
  • Yale University, B.A., 1998
  • Harvard Law School, J.D., 2004
  • New York
  • District of Columbia
  • United States Court of Appeals for the Second Circuit
  • United States Court of Appeals for the Third Circuit
  • United States District Court for the Eastern District of New York
  • United States District Court for the Southern District of New York

National Association of Criminal Defense Lawyers