Gretchen Sierra

Principal, Washington National Tax - International Tax
Deloitte Tax LLP

Gretchen T. Sierra is Managing Partner-Washington National Tax — International Tax services in Deloitte's Washington National Office. She aids U.S. and foreign multinationals on a broad range of international tax matters, including supply chain structuring, IP migration, U.S. income tax treaties, inbound planning, financing transactions, and cross-border mergers and acquisitions.

Prior to joining Deloitte in January 2009, Ms. Sierra was the Deputy International Tax Counsel in the Office of Tax Policy of the U.S. Treasury Department. As the Deputy International Tax Counsel, she had responsibility for a broad spectrum of U.S. tax treaty and international tax regulatory and legislative matters.

Before joining the Treasury Department in 2005, Ms. Sierra was a Legislation Counsel for the Joint Committee on Taxation, U.S. Congress, where she advised the House Ways & Means Committee, the Senate Finance Committee, and members of Congress on proposed international tax legislation, including the American Jobs Creation Act of 2004. She is a frequent lecturer on international tax topics and is an adjunct professor at Georgetown University Law Center.

J.D., University of Iowa College of Law (1999)
B.A., Comparative Literature, University of Iowa (1994)

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