From January 2021 until early 2023, Itai Grinberg was the Deputy Assistant Secretary (Multilateral Negotiations) in the Office of Tax Policy of the United States Department of the Treasury. He was the lead US negotiator for the global corporate minimum tax endorsed by the Leaders of the G20 at their Rome Summit meeting in 2021. He worked closely with Secretary Yellen on all international tax matters, routinely travelled with Secretary Yellen to discuss and negotiate regarding tax issues with G7 and G20 counterparts, and was the lead delegate for the United States on international tax issues across all multilateral institutions.

Itai has now returned to Georgetown University, where he is a Professor of Law. His academic research focuses on international tax policy, as well as the intersection of international tax law, international trade law, international investment law, and international financial regulation, and the relationship between taxation and climate policies. Professor Grinberg first joined the faculty from the Office of International Tax Counsel at the Department of the Treasury. In his first stint at the Treasury,

Professor Grinberg represented the United States on tax matters in multilateral settings, negotiated tax treaties with foreign sovereigns, had responsibility for a wide-ranging group of cross-border tax regulations, and was involved in international tax legislative developments.. In 2005, Professor Grinberg served as Counsel to the President’s Advisory Panel on Federal Tax Reform, where he advised a bipartisan presidential commission that made sweeping proposals to restructure the U.S. tax code.