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Sean A. Petterson
Associate, New York Office
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212 355-9500
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Sean Petterson

Sean A. Petterson is an associate in Lieff Cabraser’s New York office.  He is a member of the firm’s securities, consumer practice, and cybersecurity/data privacy practice groups where he has represented shareholders and consumers in a number of high-profile actions. These include representing shareholders in a derivative lawsuit against Wells Fargo that settled for $240 million and corporate governance reforms, and ongoing data breach and TCPA class actions on behalf of consumers.

Prior to joining Lieff Cabraser, Sean was an associate at Boies Schiller Flexner, LLP from 2015-2018, where he also spent the summer of 2014 as a summer associate. Previously, while in law school at NYU, he was a civil litigation extern in the U.S. District Court for the Southern District of New York and participated in a clinic with the New York Civil Liberties Union.

Sean graduated from New York University School of Law with a Juris Doctor, where he was a Robert McKay scholar and a Senior Quorum Editor for the Journal of Legislation and Public Policy. Sean also graduated summa cum laude from Brandeis University with a B.A. in both History and American Studies.

  • New York University School of Law, New York, NY
    J.D., 2015
    Senior Quorum Editor, Journal of Legislation and Public Policy
    Robert McKay Scholar
  • Brandeis University, Waltham, MA
    B.A., Summa Cum Laude, History and American Studies – 2011
  • New York, 2016
  • U.S. District Court, Eastern District of New York, 2017
  • U.S. District Court, Southern District of New York, 2017
  • U.S. Court of Appeals for the Eleventh Circuit, 2018
  • “Ones to Watch,” Best Lawyers, 2021