Sean Monaghan

Visiting Fellow, Europe, Russia and Eurasia Program
Sean Monaghan

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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Making the Most of the European Sky Shield Initiative

Russia’s bombardment of Ukraine has highlighted shortfalls in air and missile defense capabilities across Europe. To fill these gaps the new German-led "Sky Shield" initiative must overcome challenges of leadership, concepts, cooperation, division of labor and delivery.

Report by Sean Monaghan and John Christianson — May 19, 2023

The Eurofile

European Defense Cooperation, A New EU-U.K. Deal, and Takeaways from the Munich Security Conference

In this week’s episode of The Eurofile, Max and Donatienne discuss the recent post-Brexit EU-U.K. deal and takeaways from the Munich Security Conference. Following their conversation, they sit down with Sean Monaghan, visiting fellow with the CSIS Europe, Russia, and Eurasia Program and an expert on European defense, to discuss the current state of European defense cooperation. 

Podcast Episode by Max Bergmann , Donatienne Ruy , and Sean Monaghan — March 2, 2023

CSIS

NATO and the Invasion, One Year On

NATO has responded to Russia’s war of conquest by supporting Ukraine and strengthening its own deterrence—but one year on from the invasion, mixed progress on implementing the Madrid summit commitments makes NATO’s next summit in Vilnius even more important.

Commentary by Sean Monaghan and Gabriella Bolstad — February 22, 2023

Does the New EU-NATO Joint Declaration Matter?

This week the leaders of NATO and the European Union signed their third joint declaration. What is it and why is it significant?

Critical Questions by Sean Monaghan , Colin Wall , Otto Svendsen , and Sissy Martinez — January 13, 2023

Transforming European Defense

Europe’s decisive response to Russia’s war of aggression in Ukraine may be short-lived if it is not followed by a sustained, collective effort to transform and rationalize European defense.

Brief by Max Bergmann , Colin Wall , Sean Monaghan , and Pierre Morcos — August 18, 2022

What Happened at NATO’s Madrid Summit?

In a historic summit in Madrid, NATO leaders agreed to more support to Ukraine, reset their approach to defense and deterrence, and adopted a new strategic concept to modernize the alliance for the decade ahead.

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

As NATO unveils its eighth strategic concept since 1949 in Madrid, analysis of previous concepts suggests the alliance should revitalize the "sword and the shield" deterrence model used successfully in the Cold War to defend and deter against Russia’s "maximum intentions."

Brief by Sean Monaghan — June 28, 2022