Shannon K. O'Neil is the vice president, deputy director of studies, and Nelson and David Rockefeller senior fellow for Latin America Studies at the Council on Foreign Relations. She is an expert on Latin America, global trade, U.S.-Mexico relations, corruption, democracy, and immigration.

O’Neil is the author of the forthcoming The Globalization Myth: Regionalization and How America's Neighbors Help it Compete (Yale University Press, 2022), which chronicles the rise of three main global manufacturing and supply chain hubs and what they mean for U.S. economic competitiveness. She also wrote Two Nations Indivisible: Mexico, the United States, and the Road Ahead (Oxford University Press, 2013), which analyzes the political, economic, and social transformations Mexico has undergone over the last three decades and why these changes matter for the United States. She is a columnist for Bloomberg Opinion, and frequent guest on news, radio, and podcasts. O’Neil has testified before Congress on both Mexico and Latin America, and regularly speaks at global academic, business, and policy conferences.

O’Neil has lived and worked in Mexico and Argentina and travels extensively in Latin America. She was a Fulbright scholar and a Justice, Welfare, and Economics fellow at Harvard University, and has taught Latin American politics at Columbia University. Before turning to policy, O'Neil worked in the private sector as an equity analyst at Indosuez Capital and Credit Lyonnais Securities. She holds a BA from Yale University, an MA in international relations from Yale University, and a PhD in government from Harvard University. She is a member of the board of directors of the Tinker Foundation.