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

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Anthropic has named Mariano-Florentino (Tino) Cuéllar as its first Chief Global Affairs Officer, a newly created executive role overseeing global policy strategy, international engagement, and government relationships. Cuéllar has an unusually broad public sector résumé: he recently served as President of the Carnegie Endowment for International Peace (a foreign policy think tank with scholars in 20 countries), and before that was a Justice on the California Supreme Court where his opinions addressed technology, privacy, and the separation of powers. He served in the White House and federal agencies across three presidential administrations, directed Stanford's Freeman Spogli Institute for International Studies, and sits on the National Academy of Sciences Committee on Responsible Computing Research. Cuéllar co-led California's Frontier AI Working Group and co-chaired the bipartisan Task Force on Nuclear Proliferation and American Security, positioning him at the intersection of AI governance and national security. He has been a Trustee of Anthropic's Long-Term Benefit Trust since January 2026 and stepped down from that role to join the company. The creation of a CGAO role is itself a signal: Anthropic is formalizing its government engagement function at a time when the White House is developing AI model-testing frameworks, the EU AI Act is entering enforcement, and multiple governments are actively legislating around frontier AI. A CGAO with deep government credibility and established policy relationships could meaningfully influence regulatory outcomes.