Mariano-Florentino (Tino) Cuéllar is the Cameron Schrier Family Professor of Law and (by courtesy) Political Science at Stanford University, Sara Miller McCune Director of the Center for Advanced Study in the Behavioral Sciences, and Senior Fellow at the Stanford Institute for Human-Centered AI (HAI).  A former California Supreme Court justice and  president of the Carnegie Endowment for International Peace, he has served in three presidential administrations at the White House and in federal agencies. He is a member of the American Academy of Arts and Sciences, publishing widely on problems in American public law and democracy as the U.S. became a global power, artificial intelligence and its impact on institutions and organizations, and managing global challenges such as international security and public health.  He chairs the board of the William & Flora Hewlett Foundation.  

During his tenure as its tenth president, the Carnegie Endowment established new global centers, expanded research on artificial intelligence and political economy, strengthened its financial independence, and created new programs on the energy transition and global order.  Earlier, in the course of nearly seven years on California’s highest court while continuing to teach at Stanford, he wrote opinions addressing separation of powers, criminal justice, democracy, technology and privacy, international agreements, and climate and environmental policy, and led the court system’s operations to better meet the needs of millions of limited English speakers. He previously served as director of Stanford’s Freeman Spogli Institute, overseeing the university’s major research centers and educational programs on international affairs, and co-directed Stanford’s Center for International Security and Cooperation.

He co-chaired California’s Joint Working Group on Frontier Artificial Intelligence and the bipartisan Task Force on Nuclear Proliferation and American Security, and was a member of the National Academy of Sciences Committee on Social and Ethical Implications of Computing Research. In the Biden administration, he served on the President’s Intelligence Advisory Board and the Foreign Affairs Policy Board. In the first term of the Obama administration, he led the White House Domestic Policy Council’s teams working on civil and criminal justice, public health, immigration, and regulatory reform. He also co-chaired the U.S. Department of Education’s Equity and Excellence Commission, and earlier, co-chaired the Obama-Biden Transition Immigration Working Group. He began his career at the U.S. Department of the Treasury in the second term of the Clinton administration.

He is a fellow of the Harvard Corporation, a trustee of Anthropic, and serves on the boards of Inflection AI and LawZero. Born in Matamoros, Mexico, he grew up primarily in communities along the U.S.-Mexico border. He graduated from Harvard College and Yale Law School, and received a Ph.D. in political science from Stanford University. He and his wife, Judge Lucy Koh of the U.S. Court of Appeals for the Ninth Circuit, have two children.