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Kathleen (Katie) M. O'Sullivan

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Partner

Co-Chair Appellate Practice Group

Kathleen (Katie) O'Sullivan is the Co-Chair of the firm's Appellate Practice Group. Her practice focuses on complex business litigation, class action defense, constitutional litigation and appellate litigation.

Professional Recognition

  • Listed in The Best Lawyers in America, 2009 - 2011
  • Listed in Washington Law & Politics, “Washington's Super Lawyers," 2007 - 2010
  • Co-Recipient of American Bar Association IOLTA Litigation Team Award, 2003
  • Co-Recipient of Washington State Bar Association Award of Merit, 2003
  • Co-Recipient of King County Bar Association President’s Award, 2003
  • Co-Recipient of Perkins Coie Pro Bono Award, 2003
  • Co-Recipient of King County Bar Foundation Champion of Justice Award, 2002

Professional Leadership

  • Washington State Bar Association, Board of Governors, 2003 - 2006
  • Federal Bar Association for the Western District of Washington, Chair of Appellate Practice Committee, 2007 - 2008
  • Elected to American Law InstitutePrinciples of Aggregate (Class Action) Litigation, Members Consultative Group
  • Washington Commission on Judicial Conduct, 2007 - present; current Vice Chair

Community Involvement

Related Employment

  • DNA – People’s Legal Services, Window Rock, Navajo Nation, AZ, Law Clerk, Summer 1994

Clerkships

  • Hon. Harold H. Greene, U.S. District Court for the District of Columbia, 1996 - 1997
  • Hon. M. Margaret McKeown, U.S. Court of Appeals for the Ninth Circuit, 1998 - 1999

Education

  • Georgetown University Law Center, J.D., cum laude, 1996
    Senior Notes Editor, Georgetown Law Journal
  • Yale University, B.A., History, cum laude, 1991

Bar Admissions

  • Washington

Court Admissions

  • U.S. Supreme Court
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. District Court for the Western District of Washington
  • U.S. District Court for the Eastern District of Washington