Beatrice Fihn @beafihn.bsky.social International law, security and weapons at Lex International. Senior Fellow @UNIDIR. Former Executive Director of ICAN, Nobel Peace Prize Laureate 2017.
🇸🇪in🇨🇭www.beatricefihn.com
Matthew Harries @matthewharries.bsky.social Research director at the Labour Movement for Europe. Previously director of nuclear policy at RUSI, managing editor of Survival/senior fellow at IISS, and specialist for the Foreign Affairs Committee.
Fabian Hoffmann, PhD @frhoffmann.bsky.social Doctoral Research Fellow at the Oslo Nuclear Project, University of Oslo. Defense policy, missile technology, and nuclear strategy.
Weekly analysis of missile tech, nuclear strategy, and European deterrence 👇
https://missilematters.substack.com/subscribe
Ellen Nakashima @ellenwapo.bsky.social Intelligence and national security reporter at The Washington Post. Reach me securely on Signal at Ellen.626.
Joseph Dempsey @josephhdempsey.bsky.social Research Associate for Defence & Military Analysis,
The International Institute for Strategic Studies
Jim Goldgeier @jimgoldgeier.bsky.social Senior advisor, Bridging the Gap; Fellow at Center for Advanced Study and FSI Research Affiliate, Stanford; Non-resident fellow, Kennan Institute. Was a professor for 35 years and a dean for six. Views are my own. www.jamesgoldgeier.com.
Andreas Persbo @persbo.bsky.social Programme Director at the One Earth Future Foundation, formerly with UNIDIR, European Leadership Network, and VERTIC.
Jamie Withorne @jamiewithorne.bsky.social Nuclear weapons, international politics, and “”emerging”” technology.
Doctoral Research Fellow in Political Science, University of Oslo
LearnWMD Spreadsheet and Substack: www.jamiewithorne.com
Kadri Liik @kadriliik.bsky.social Professional focus on Russia, other interests many and varied.
Steffan Watkins 🇨🇦 @steffanwatkins.bsky.social I'm a writer and research consultant specializing in tracking ships and planes using publicly available information.
https://www.patreon.com/SteffanWatkins
Federation of American Scientists @scientistsorg.bsky.social Striving for a safer world since 1945
science policy | nuclear weapons | clean energy | STEM education | artificial intelligence | data privacy | much much more
Derek Johnson @derekjesq.bsky.social Chaos Muppet, Order Rising. CEO, ResearchCollaborative.org. Young(ish) Leader, Munich Security Conference + Friends of Europe. Former head of GlobalZero.org. Radicalized by basic decency. Made in #Iowa with parts from #Iran. he/him 🇦🇲
Matt Korda @mattkorda.bsky.social I count nukes for the Federation of American Scientists + the Stockholm International Peace Research Institute. 🇨🇦 Views my own.
Kelsey Atherton @atherton.bsky.social War, robots, & bad futures but imagining better. I edit @cipolicy.bsky.social's International Policy Journal, opinions my own. Unitarian Universalist. He/him. Husband to @alymay.bsky.social & father of 2.
Front takes towards enemies.- K @kramnik.bsky.social @kramnik.bsky.social
Jeffrey Lewis @armscontrolwonk.bsky.social William J. Perry Lecturer at Stanford CISAC & Distinguished Research Fellow FPRI. Member of the Bulletin of Atomic Scientists Science and Security Board & National Academies Committee on Int’l Security and Arms Control.
Steve Trimble @thedewline.bsky.social I’m the Defense Editor at Aviation Week.
Hans Kristensen @nukestrat.bsky.social Director, Nuclear Information Project, Federation of American Scientists. Tracking nuclear arsenals, co-author of Nuclear Notebook, SIPRI Yearbook. Opinions my own.
Website: https://fas.org/initiative/nuclear-information-project/
Sam Greene @samagreene.bsky.social Professor of Russian Politics, King's College London. Political sociologist. Progressive. Co-author, Putin v the People. 🇬🇧/🇺🇸
Emma Ashford @emmamashford.bsky.social Senior Fellow at Stimson Center, Columnist at Foreign Policy, and Adjunct Prof at Georgetown CSS.
Research on US grand strategy and energy security. Working on a book about US foreign policy in a multipolar world.
All views mine! 
Laura Rozen @lkrozen.bsky.social Reporting on foreign policy. Current: https://diplomatic.substack.com Just Security ed board. Al Monitor, Politico, Foreign Policy alum.
Sergey Radchenko @radchenko.bsky.social Historian of the Cold War and after. Wilson E. Schmidt Distinguished Professor, Henry A. Kissinger Center for Global Affairs, Johns Hopkins School for Advanced International Studies. The author of “To Run the World.”
Kevin Rothrock @kevinrothrock.me Russia watcher supreme at @meduza.io. (All skeets here are my views alone.) Ugly American based in Portland, Oregon. Signal: @KevinRothrock.01 / Find all my junk here: https://linktr.ee/kevinrothrock
Dmitri Alperovitch @dmitri.silverado.org Geopolitics, Russia, China, Cyber
Chairman @silverado.org
Author of WorldOnTheBrink.com
Host GeopoliticsDecanted.com podcast
Founder Alperovitch Institute for Cybersecurity Studies at Johns Hopkins SAIS
Co-Founder CrowdStrike
@DAlperovitch elsewhere
Cheryl Rofer @cherylrofer.bsky.social Retired nuclear scientist. Worked in Estonia, Kazakhstan, and Los Alamos on environmental cleanup, nuclear nonproliferation, and the nuclear fuel cycle.
She/her.
Blogs at Nuclear Diner and Lawyers, Guns & Money
Photo: Semipalatinsk Nuclear Test Site
Daniel Drezner @dandrezner.bsky.social Political science professor, academic dean, writer, podcaster, shaker of hands with Mel Brooks — you know, the usual kinks.
Samuel Bendett @sambendett.bsky.social Uncrewed, autonomous, robotic systems and Artificial Intelligence. Russian and Ukrainian weapons development. CNA, CNAS and CSIS. Opinions my own.
Dmitry Stefanovich @dvsteff.bsky.social Nukes, missiles, military, space, tech, music, cats, #STRATDELA and #HYPERHYPE 
Shashank Joshi @shashj.bsky.social Incoming Washington bureau chief at The Economist. Previously defence editor for eight years.
Visiting Fellow at Department of War Studies, KCL. For speaking engagements: https://chartwellspeakers.com/speaker/shashank-joshi
Ulrike Franke @rikefranke.bsky.social Senior Fellow at European Council on Foreign Relations. #Drone politics PhD @ox.ac.uk. Teaches at @SciencesPo.bsky.social. Writes about all things #Germany #Defence #miltech. Podcast host at @SicherheitsPod.de & LeCollimateur
Michael Kofman @michaelkofman.bsky.social Senior Fellow, Carnegie Endowment. Defense analysis with a focus on the Russian and Ukrainian militaries.
Nicole Grajewski @nicolegrajewski.bsky.social Assistant Professor at Sciences Po CERI | Associate with Harvard’s Managing the Atom | working on nuclear issues involving Russia and Iran | author of Russia and Iran: Partners in Defiance from Syria to Ukraine (OUP/Hurst)
Brian Weeden @brianweeden.bsky.social Space policy wonk, former engineer, husband, father, Dungeon Master, and all around geek. I post things I find insightful, informative, or provocative
Janis Kluge @jakluge.de Russia & Economics
All views private
German Institute for International and Security Affairs (SWP Berlin)
Picture: Tamek Kowalski
Maren Vieluf @marenvieluf.bsky.social Desk Officer @ GFFO | Interested in all things nuclear weapons and international order | PhD Candidate @ Uni Innsbruck | Personal Account |
Jana Puglierin @jpuglierin.bsky.social Foreign policy nerd, especially interested in European security & transatlantic relations. Head of @ecfrberlin.bsky.social. FirstGen. Author of „Wer verteidigt Europa“ published with Rowohlt in January 2026. DB Ruhebereich Ultra and deltidsvärmlänning.
Gabriela I. Rosa @gabrielairosa.bsky.social Bori de Toa Alta - Analyst @CNA_org Russia Studies Program - I write about Russia + European Security for the military-intellectual complex - Opinions my own
Sabine Fischer @sabfis3.bsky.social Senior Fellow, German Institute for International and Security Affairs, here in personal capacity, views strictly my own.
Pavel Podvig @russianforces.org Russian nuclear forces, nuclear arms control, disarmament, verification. Strictly personal views here.
All coordinates are at http://russianforces.org/podvig
Constanze Stelzenmüller @constelz.bsky.social Director CUSE, Germany explainer etc. @ Brookings; FT contributing columnist; Wizards Fan (I know). When the going gets tough, the tough go blonde. Pic: Marc Darchinger. Views my own, people.
Frank Sauer @drfranksauer.bsky.social 🎙️ Co-Host @sicherheitspod.de
🤓 Head of Research @metis.unibw.de
🐦 https://twitter.com/drfranksauer/ 👈 inactive
🦣 http://mastodontech.de/@drfranksauer 👈 bridged
Olya Oliker aka Dr. Olga Oliker (she/her) @olyaoliker.bsky.social Director, European Security @crisisgroup.org / Feminist / Migrant / ❤️ punk rock (but not only) / Opinions own / Endorsements clearly marked / podcast: https://www.crisisgroup.org/pod/europe/war-peace