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Robert B. Stack

Robert B. Stack

U.S. Department of the Treasury
Deputy Assistant Secretary, International Tax Affairs (Tax Policy)
Washington, DC, USA

Bob Stack is the Deputy Assistant Secretary for International Tax Affairs in the Office of Tax Policy at the US Department of the Treasury. In this capacity, he is responsible, on behalf of the Assistant Secretary, for the conduct of legal and economic aspects of tax policy relative to the representation of the United States in bilateral and multilateral relations with other countries, as well as advising the legal and economic staffs within the Office of Tax Policy, other offices of the Treasury Department and other government agencies as to policy analysis and interpretation for domestic legislation and administrative guidance in all matters involving cross border taxation. Mr. Stack serves as the U.S. delegate to the Committee on Fiscal Affairs (CFA) in the Organization for Economic Cooperation and Development (the OECD). In addition, Mr. Stack oversees the Office of Tax Policy’s participation in the various working bodies of the CFA and sits on the CFA Bureau (the CFA’s governing body). Mr. Stack also serves as the U.S. delegate to the Global Forum on Transparency.

Prior to joining Treasury, Mr. Stack served as head of the international tax practice group at the law firm of Ivins, Phillips & Barker. In the private sector, he has over 26 years of experience in international tax matters, representing both corporations and individuals. His work for corporations has included structuring both inbound and outbound ventures, the establishment of efficient cross border structures, the formation of joint ventures and private equity funds and all aspects of international mergers and acquisitions.

He is a member of the American Bar Association Tax Section, New York State Bar Association Tax Section, and International Fiscal Association. Mr. Stack has participated in numerous panels on international tax issues at the meetings of the American Bar Association Tax Section as well as the Federal Bar Association. He graduated from Georgetown University Law Center in 1984, where he was editor-in-chief of the Georgetown Law Journal. After graduating, he clerked for Judge Thomas A. Flannery of the United States District Court for the District of Columbia and Justice Potter Stewart (Ret.) of the United States Supreme Court.

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