Hon. Eileen O'Connor

Partner, Pillsbury Winthrop Shaw Pittman LLP

Lee O’Connor is a partner in the law firm’s federal tax controversy and tax policy group and located in the Washington, DC office. Ms. O’Connor represents clients in civil and criminal federal tax investigations, and in disputes with other government agencies, and formulates and advises on regulatory and legislative solutions to government disputes. She has presented oral arguments in the United States Supreme Court and in the United States Courts of Appeals.

Ms. O'Connor joined Pillsbury in July 2007 after serving for six years as the Assistant Attorney General for the Tax Division of the United States Department of Justice. While at the Department of Justice, she was a member of the President's Corporate Fraud Task Force.

As Assistant Attorney General, Ms. O'Connor headed a division of more than 600 people, supervising the litigation in federal courts - civil and criminal, trial and appellate – of its 350 attorneys. Significant cases during her tenure involved corporate and individual abusive tax shelters and offshore tax evasion. She created and implemented continuing programs to coordinate parallel civil and criminal investigations and judicial proceedings with the Internal Revenue Service and United States Attorneys Offices throughout the country. In recognition of her outstanding contributions to the accomplishment of the Justice Department's mission, Ms. O'Connor received the Edmund J. Randolph Award for Outstanding Service. And for her contributions to federal tax administration and enforcement, the Commissioner of the Internal Revenue Service and the IRS Chief Counsel awarded her their highest honors.

Early in her career, Ms. O'Connor was a Corporate Tax Law Specialist in the National Office of the Internal Revenue Service. She is also a CPA and, for more than 20 years, was a national tax consultant with top national accounting firms.

Ms. O'Connor has taught in the graduate tax law program of Georgetown University School of Law, and was Distinguished Adjunct Professor of Tax Policy at the George Mason University School of Law, and has long been a frequent speaker at bar conferences and business seminars.

  • J.D., Catholic University of America, Columbus School of Law, 1978
  • B.S.B.A., Columbus State University, 1973

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Publications and Multimedia
Disinherited: How Washington Is Betraying America's Young - Podcast
Administrative Law & Regulation Practice Group Podcast
July 16, 2015
Without Standing, Are We All Sitting Ducks? - Event Video
2014 National Lawyers Convention
November 17, 2014
Drones and Presidential Authority - Event Audio/Video
2014 Annual Student Symposium
March 25, 2014
Extortion: How Politicians Extract Your Money, Buy Votes, and Line Their Own Pockets - Podcast
Administrative Law & Regulation Practice Group Podcast
November 13, 2013
Terms of Engagement - Podcast
Administrative Law & Regulation Practice Group Podcast
October 14, 2013
The Bucks Start Here - Podcast
Administrative Law & Regulation Practice Group Podcast
October 07, 2013
City of Arlington - How much Deference? - Podcast
Administrative Law & Regulation Practice Group Podcast
June 13, 2013
The 25th Anniversary of Chevron - Event Audio/Video
2008 National Lawyers Convention
November 22, 2008
SCOTUScast 4-22-08 featuring Eileen O'Connor
MeadWestvaco Corp. v. Illinois Dept. of Revenue
April 22, 2008