
Sean Monaghan is a visiting fellow in the Europe, Russia, and Eurasia Program at the Center for Strategic and International Studies, where he focuses on NATO, European security, and defense. His career as a civil servant in the UK Ministry of Defence has focused on international defense policy, including NATO, the European Union, and the United States. In recent years, his work as a policy analyst has seen him contribute to the United Kingdom's Integrated Review and lead multinational research projects.
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In the News
En gigantisk opgave venter Mette Frederiksen, hvis hun skifter job: Hun skal bringe NATO »tilbage til fremtiden«
Sean Monaghan in Berlingske — June 2, 2023
NATO on the precipice
Sean Monaghan in Politico — February 24, 2023
Russia's invasion exposed a weakness, NATO must quickly solve it, says analyst
Sean Monaghan in Seznam Zprávy — February 23, 2023
Poland: Joe Biden's visit bolsters tight US-Polish bond
Sean Monaghan in DW — February 20, 2023
Biden to mark one year of Russia-Ukraine war in Poland
Sean Monaghan in The Hill — February 19, 2023
US aid to Ukraine could be the next victim of Kevin McCarthy's pact with far-right Republicans
Sean Monaghan in Business Insider — February 5, 2023
Challengers and challenges: The promise and perils of UK leadership
Sean Monaghan in Defense News — January 19, 2023
Das Schwert, der Schild und der Igel – Die Stärkung der Abschreckung im Rahmen des neuen Strategischen Konzepts der NATO
Sean Monaghan in De Gruyter — November 29, 2022
All content by Sean Monaghan
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Making the Most of the European Sky Shield Initiative
Report by Sean Monaghan and John Christianson — May 19, 2023
Deterring a Cross-Strait Conflict: Beijing's Assessment of Evolving U.S. Strategy
Event by Jude Blanchette , Elbridge Colby , Bonnie Glaser , Kristen Gunness , Michael Mazarr , and Sean Monaghan — March 6, 2023
European Defense Cooperation, A New EU-U.K. Deal, and Takeaways from the Munich Security Conference
Podcast Episode by Max Bergmann , Donatienne Ruy , and Sean Monaghan — March 2, 2023

Solving Europe’s Defense Dilemma: Overcoming the Challenges to European Defense Cooperation
Brief by Sean Monaghan — March 1, 2023
NATO and the Invasion, One Year On
Commentary by Sean Monaghan and Gabriella Bolstad — February 22, 2023
Does the New EU-NATO Joint Declaration Matter?
Critical Questions by Sean Monaghan , Colin Wall , Otto Svendsen , and Sissy Martinez — January 13, 2023
Five Steps NATO Should Take after the Nord Stream Pipeline Attack
Commentary by Sean Monaghan — October 6, 2022
Transforming European Defense
Brief by Max Bergmann , Colin Wall , Sean Monaghan , and Pierre Morcos — August 18, 2022
What Happened at NATO’s Madrid Summit?
Critical Questions by Sean Monaghan , Colin Wall , and Pierre Morcos — July 1, 2022
Resetting NATO’s Defense and Deterrence: The Sword and the Shield Redux
Brief by Sean Monaghan — June 28, 2022