On August 4, 2026, Anthropic announced that Mariano‑Florentino (Tino) Cuéllar will join the company as its inaugural Chief Global Affairs Officer. In this role he will lead Anthropic’s policy work, strategic international engagement, and relations with governments around the world.
Professional background
Cuéllar’s career spans law, technology, international security, and public institutions at international, national, and state levels. He most recently served as President of the Carnegie Endowment for International Peace, an independent global policy research organization with scholars in 20 countries; he stepped down from that role prior to joining Anthropic.
Earlier in his career, Mariano‑Florentino Cuéllar served as a Justice of the Supreme Court of California, where his opinions covered issues including technology and privacy, international agreements, and separation of powers. At Stanford University he held several leadership posts: director of the 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 worked in the White House and federal agencies across three presidential administrations and has served on the President's Intelligence Advisory Board and the US Department of State's Foreign Affairs Policy Board. The National Academy of Sciences appointed him to its Committee on Responsible Computing Research.
Public service and research roles
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 artificial intelligence courses nearly a decade ago. He also serves as a Senior Fellow at Stanford’s Institute for Human‑Centered Artificial Intelligence.
Relationship with Anthropic and Trust resignation
Cuéllar had been a Trustee of Anthropic’s Long‑Term Benefit Trust since January 2026. To join the company’s staff he has stepped down from the Trust; the Trust will select a successor through its normal process.
Why this matters
Anthropic said Cuéllar arrives at a pivotal moment for its engagement with governments worldwide. Leaders and policymakers are debating AI’s implications for economies, security, and communities; ensuring that democratic societies shape the technology’s trajectory and that its benefits are broadly distributed is a stated priority for the company. Cuéllar will be tasked with advancing that work and building common ground with heads of state and policy leaders on the risks and opportunities AI presents.
Statements
“Policymakers in the US and around the world are increasingly realizing that we are at a critical inflection point when it comes to how we govern and develop artificial intelligence. The choices we make today will determine whether humanity can harness extraordinary possibilities to advance science and improve lives across the world or face enormous risk and growing inequality,” said Mariano‑Florentino Cuéllar. “Democracies must set the terms on which this technology advances, and there is no more consequential place to be shaping that work right now than Anthropic.”
Daniela Amodei commented: “Tino has spent his career helping public institutions respond to times of change with thoughtfulness, pragmatism, and deep commitment to the common good. At all levels of government, the law, and academia, Tino has served with sound judgment and civic‑mindedness, and we’re looking forward to him putting these principles to work at Anthropic. I can't think of anyone better prepared to partner with governments, civil society, and community groups as they engage with both the risks and opportunities presented by advanced AI.”
Anthropic frames Cuéllar’s appointment as part of its effort to strengthen global government engagement while debates over AI’s societal and economic effects continue among leaders worldwide.
