Joshua Geltzer

ASU Future of War Fellow

Joshua Geltzer, ASU Future of War Fellow, is writing a book exploring challenges associated with modern communications technologies such as social media platforms, file-upload sites, and internet search engines.  He is the executive director and visiting professor of law at Georgetown University Law Center's Institute for Constitutional Advocacy and Protection.  

From 2015 to 2017, he served as senior director for counterterrorism at the National Security Council staff, having served previously as deputy legal advisor to the National Security Council and as counsel to the assistant attorney general for national security at the Department of Justice.  He also served as a law clerk to Justice Stephen Breyer of the U.S. Supreme Court and, before that, as a law clerk to Chief Judge Alex Kozinski of the Ninth Circuit Court of Appeals.  

Josh received his J.D. from Yale Law School, where he served as editor-in-chief of the Yale Law Journal, and his PhD in War Studies from King’s College London, where he was a Marshall Scholar.  Before that, he attended Princeton University, majoring in the Woodrow Wilson School of Public and International Affairs.  He is the author of US Counter-Terrorism Strategy and al-Qaeda: Signalling and the Terrorist World-View, published by Routledge; and his work has appeared in The Atlantic, Foreign Policy, ParametersStudies in Conflict & Terrorism, the Journal of Constitutional Law, and the Berkeley Journal of International Law.

All Work

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As Trump Wavers on Libya, an ISIS Haven, Russia Presses On

Joshua Geltzer was quoted in the New York Times on the instability in Libya:


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Debate, Dispute, Disagree—But Please Don’t Call for Arrest

Joshua Geltzer wrote for Just Security on how the language of law enforcement has infected political discourse.


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FBI Director Must Be Prepared to Resign Over Nunes Memo, Ex-Agents Warn

Joshua Geltzer was quoted by the Daily Beast on President Trump's attacks on the Department of Justice and FBI.


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Despite Bumpy First Year, National Security Advisor Leaves Imprint on White House

Joshua Geltzer was quoted in the Washington Diplomat about the Trump administration's National Security Strategy.


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Executive Order to Keep Guantanamo Bay Open Is Trump’s Gift to ISIS

Joshua Geltzer was quoted in the Daily Beast about President Trump's decision to authorize sending terrorist detainees to Guantanamo Bay.


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DOJ Crackdown on 'Sanctuary Cities' a Danger to Public Safety, Amicus Brief Co-Author Says

Joshua Geltzer was quoted in Legal Newsline cautioning against the federal government's crackdown on sanctuary cities.


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Background Briefing with Ian Masters

Joshua Geltzer appeared on "Background Briefing with Ian Masters" to discuss the HPSCI-Nunes memo.


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You Don’t Need to Know What’s in the Nunes Memo to Worry About Its Release

Joshua Geltzer wrote for Just Security on the memo released by Devin Nunes and the House Permanent Select Committee on Intelligence.


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Kansas-based Crosscheck spreadsheet compromises 945 voters’ data

Joshua Geltzer was quoted in the Topeka Capital-Journal about the Kansas Secretary of State compromising nearly 1,000 voters' data.


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Trump Admin Touts Stats Linking Immigration to Terror

Joshua Geltzer was quoted by CNN on the new DHS/DOJ report and whether slowing immigration deals with where and how terrorists radicalize.


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A Checklist for Protecting Our Elections from Foreign Meddling

Joshua Geltzer wrote for Just Security about how Americans can prepare themselves against hostile foreign agents undermining our elections.


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The C.I.A.’s Maddening Relationship with Pakistan

Joshua Geltzer was quoted in a New Yorker story about the C.I.A.'s targeting of al Qaeda in Pakistan.