David Lizmi is counsel in Mayer Brown’s New York office. Previously, he was an Assistant United States Attorney (AUSA) in the US Attorney’s Office for the Eastern District of New York (EDNY), where he served as the Computer Hacking and Intellectual Property (CHIP) Coordinator and founding member of the EDNY Cybercrime Task Force.

David represents corporate and individual clients across a diverse range of legal areas, including internal and government investigations and white collar criminal defense, with a particular focus on representing clients concerning privacy laws, data breaches, cybercrime, securities fraud, bribery, corruption, and Foreign Corrupt Practices Act matters. David also advises clients concerning complex civil litigation and trial practices including representing clients in large commercial matters involving contract disputes, class actions, and employment disputes. David also represents companies and individuals in state and federal appellate courts nationwide.

As a federal prosecutor, David investigated, prosecuted, and tried complex and sensitive cases across a wide spectrum of subject matters, including, data breaches, DDoS and ransomware attacks, securities fraud, mail and wire fraud, international money laundering, tax fraud, bribery, and international public corruption, among other areas. David has tried numerous cases to verdict in addition to serving as one of EDNY’s leading cybercrime prosecutors in his role as CHIP and as part of the Cybercrime Task Force. David also argued more than a dozen cases before the United States Court of Appeals for the Second Circuit.

Prior to becoming an AUSA, David worked on significant securities, commercial, and pharmaceutical litigation matters with Mayer Brown. Earlier in his career, David clerked for the Honorable Claire C. Cecchi, District Court Judge for the District of New Jersey.

Spoken Languages

  • English


Fordham University School of Law, JD
Dean's list
Fordham Urban Law Journal, Symposium Editor

The University of Connecticut, BA, summa cum laude


  • New York