# Mariano-Florentino Cuéllar

Leadership · Chief Global Affairs Officer at Anthropic · joined 2026

A former California Supreme Court justice and president of the Carnegie Endowment, hired in 2026 as Anthropic's first chief global affairs officer.

Full profile: https://www.autumn.ai/resources/anthropic/people/mariano-florentino-cuellar

**At Anthropic:**
- Aug 2026 – present: Chief Global Affairs Officer
Sources: [1](https://www.linkedin.com/in/mariano-florentino-tino-cuéllar-791ab2)

**Career before Anthropic:**
- Oct 2021 – Jul 2026: Carnegie Endowment for International Peace, President
- Jan 2015 – Nov 2021: Stanford Law School, Herman Phleger Visiting Professor
- Jan 2015 – Oct 2021: Supreme Court of California, Justice
- Aug 2012 – Jan 2015: Stanford Law School, Stanley Morrison Professor of Law
- Feb 2009 – Jul 2010: The White House, Special Assistant to the President for Justice and Regulatory Policy
- Aug 2007 – Aug 2012: Stanford Law School, Professor and Deane Johnson Faculty Scholar
- Jul 2004 – Jan 2015: Stanford University, Director (and other positions), Freeman Spogli Institute for International Studies
- Aug 2003 – Aug 2007: Stanford Law School, Associate Professor
- Aug 2001 – Aug 2003: Stanford Law School, Assistant Professor
- Jul 2000 – Aug 2001: U.S. Court of Appeals for the Ninth Circuit, Law Clerk to Chief Judge Mary M. Schroeder
Sources: [1](https://www.linkedin.com/in/mariano-florentino-tino-cuéllar-791ab2)

**Education:**
- A.B., Government and Political Psychology, Harvard University, 1993
- J.D., Law, Yale Law School, 1997
- Ph.D., Political Science, Stanford University, 2000
- M.A., Political Science, Stanford University, 1996
Sources: [1](https://en.wikipedia.org/wiki/Mariano-Florentino_Cu%C3%A9llar)

**Lesser-known facts:**
- Holds a Harvard AB, a Yale law degree and a Stanford PhD in political science. [1](https://en.wikipedia.org/wiki/Mariano-Florentino_Cu%C3%A9llar)
- Co-led California's working group on frontier AI models with Fei-Fei Li. [1](https://en.wikipedia.org/wiki/Mariano-Florentino_Cu%C3%A9llar)
- Served as Special Assistant to President Obama for Justice and Regulatory Policy in 2009 and 2010. [1](https://en.wikipedia.org/wiki/Mariano-Florentino_Cu%C3%A9llar)
- Joined the California Supreme Court without ever having served as a judge, and earned a reputation there as a pragmatist. [1](https://www.dailyjournal.com/articles/393491-former-justice-cuellar-joins-anthropic-as-global-affairs-chief)
- Began organizing classes on artificial intelligence at Stanford Law School nearly a decade before joining Anthropic. [1](https://www.anthropic.com/news/tino-cuellar)
- Was a trustee of Anthropic's Long-Term Benefit Trust from January 2026, stepping down to join the company. [1](https://www.anthropic.com/news/tino-cuellar)
- That working group's 2025 report helped inform California's SB 53, the first US law focused specifically on AI safety. [1](https://thenextweb.com/news/anthropic-names-first-chief-global-affairs-officer)
- Co-founded a nonprofit in law school that placed students as English teachers in underserved communities. [1](https://en.wikipedia.org/wiki/Mariano-Florentino_Cu%C3%A9llar)

**Known for:**
- Government by Algorithm (ACUS, 2020; co-authored)
- Administrative Law: The American Public Law System (West, 2020, 2014; co-authored)
- Governing Security (Stanford University Press, 2013)
Sources: [1](https://en.wikipedia.org/wiki/Mariano-Florentino_Cu%C3%A9llar)

Researched with Autumn (https://www.autumn.ai) from public sources. Updated 2026-10-18. Everyone at Anthropic: https://www.autumn.ai/resources/anthropic/people