Mariano-Florentino (Tino) Cuéllar to join Anthropic as Chief Global Affairs Officer

Anthropic has named Mariano-Florentino (Tino) Cuéllar as its first Chief Global Affairs Officer, leading the company's policy, strategic international engagement, and government relationships worldwide. Cuéllar has stepped down from Anthropic's Long-Term Benefit Trust, where he had been a trustee since January 2026; the Trust will select a successor under its normal process.

Cuéllar brings a career spanning law, technology, international security, and public institutions. He recently stepped down as President of the Carnegie Endowment for International Peace, a global policy research institution with scholars in 20 countries. Prior to that, he served as a Justice of the Supreme Court of California, where his opinions addressed technology and privacy, international agreements, and the separation of powers. He was also director of Stanford's Freeman Spogli Institute for International Studies, co-director of the Center for International Security and Cooperation, and director of the Stanford Cyber Initiative. He has served on the President's Intelligence Advisory Board and the US Department of State's Foreign Affairs Policy Board, and worked in the White House and federal agencies in three presidential administrations. The National Academy of Sciences appointed him to its Committee on Responsible Computing Research.

In recent years, Cuéllar co-chaired the bipartisan Task Force on Nuclear Proliferation and American Security, co-led California's Frontier AI Working Group, and served as board chair and later director of the Center for Advanced Study in the Behavioral Sciences. He is currently the Cameron Schrier Family Professor at Stanford Law School, where he began his teaching career and started organizing classes on artificial intelligence nearly a decade ago. He also serves as Senior Fellow at Stanford's Institute for Human-Centered Artificial Intelligence.

Commenting on the move, Cuéllar said policymakers in the US and around the world are realizing we are at a critical inflection point for AI governance, and that democracies must set the terms on which the technology advances, making Anthropic a consequential place to shape that work. Anthropic CEO Daniela Amodei praised Cuéllar's career of helping public institutions respond to change with thoughtfulness and pragmatism, noting his sound judgment and civic-mindedness across government, law, and academia, and expressing anticipation for bringing those principles to Anthropic.