FacultyFaculty/Author Profile
Karen Patton Seymour

Karen Patton Seymour

Sullivan & Cromwell LLP

New York, NY, USA

Karen Patton Seymour is a member of the Firm’s Management Committee and was formally the Co-Managing Partner of the Firm’s Litigation Group.  Her practice focuses on white-collar criminal defense and internal investigations.  She also represents clients in complex federal and state civil litigation.  She has in-depth experience representing corporations and individuals outside of the United States in responding to U.S. inquiries and investigations, and assisting in complex international investigations.

From 2002-2004, Ms. Seymour served as the chief of the Criminal Division for the U.S. Attorney’s Office for the Southern District of New York, where she supervised 165 federal prosecutors and oversaw all criminal investigations and prosecutions in the district, including the investigations of corporate fraud involving WorldCom, ImClone and Adelphia.  She was lead trial counsel for the government in the prosecution of Martha Stewart and Peter Bacanovic. During her first tenure in the U.S. Attorney's Office from 1990 to 1996, she prosecuted a wide variety of cases and served as Chief of the General Crimes Unit.

Ms. Seymour is on the boards of various organizations including the Vera Institute of Justice, and serves as a member of the Attorney Grievance Committee for the U.S. Court of Appeals for the Second Circuit and a Panel Chair for the Departmental Disciplinary Committee for the Appellate Division of the Supreme Court State of New York, First Department.  She also serves as Chair of the New York City Bar Association’s Committee on White Collar Criminal Law, National Vice Chair of the ABA Criminal Justice Section White Collar Crime Committee, is a Member of the American Law Institute and a Trustee of The Nature Conservancy for New York State.

Ms. Seymour is a graduate of Southern Methodist University, the University of Texas Law School, and the University of London Law School.


  • twitter
  • LinkedIn
  • YouTube
  • RSS

All Contents Copyright © 1996-2019 Practising Law Institute. Continuing Legal Education since 1933.

© 2019 PLI PRACTISING LAW INSTITUTE. All rights reserved. The PLI logo is a service mark of PLI.