Sean A. Petterson

Top rated Class Action & Mass Torts attorney in New York, New York

Lieff Cabraser Heimann & Bernstein, LLP
Sean A. Petterson
Lieff Cabraser Heimann & Bernstein, LLP

Practice Areas: Class Action & Mass Torts, Securities Litigation

Licensed in New York since: 2016

Education: New York University School of Law

Selected to Rising Stars: 2021 - 2023

Lieff Cabraser Heimann & Bernstein, LLP

250 Hudson Street
8th Floor
New York, NY 10013-1413 Phone: 212-355-9500 Email: Sean A. Petterson Visit website


Sean A. Petterson is a partner 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.

First Admitted: 2016, New York

Professional Webpage:

  • “Ones to Watch,” Best Lawyers, 2021-2024; “Rising Star for New York Metro Area,” Super Lawyers, 2021, 2022, Lieff Cabraser Heimann & Bernstein
Educational Background:
  • Brandeis University, Waltham, MA, B.A., Summa Cum Laude, History and American Studies – 2011

Office location for Sean A. Petterson

250 Hudson Street
8th Floor
New York, NY 10013-1413


3 Years Rising Stars
  • Rising Stars: 2021 - 2023

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