Itai Grinberg is the Carmack Waterhouse Professor of International Economic Law at Georgetown University. His work focuses on fundamental tax reform, international tax policy, the intersection of international tax law, international trade law, and investment law, and the relationship between taxation and climate policies.

From January 2021 until early 2023, he was Deputy Assistant Secretary (Multilateral Negotiations) in the Office of Tax Policy in the United States Department of the Treasury. In that rule he led the conceptualization and negotiation of 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 tax issues with G7 and G20 counterparts, and was the lead figure for the United States on international tax issues across all multilateral institutions.