
Lachlan MacKenzie is a research associate with the Project on Nuclear Issues in the Defense and Security Department at the Center for the Strategic and International Studies (CSIS). Previously, Lachlan worked as an intern with the Institute for the Study of War and the Institute for National Strategic Studies. He graduated from Brown University with a BA in international relations.
All Lachlan MacKenzie Content
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Ukraine’s Drone Swarms Are Destroying Russian Nuclear Bombers. What Happens Now?
Critical Questions by Masao Dahlgren and Lachlan MacKenzie — June 4, 2025
Ukraine’s Drone Swarms Are Destroying Russian Nuclear Bombers. What Happens Now?
Podcast Episode by Masao Dahlgren and Lachlan MacKenzie — June 4, 2025

Game On: Opportunities for Euro-Atlantic Strategic Stability and Arms Control
Report by Heather Williams, Nicholas Adamopoulos, Lachlan MacKenzie, and Catherine Murphy — April 21, 2025
Why Does the United States Need a More Flexible Nuclear Force?
Critical Questions by Heather Williams and Lachlan MacKenzie — April 3, 2025
Why Does the United States Need a More Flexible Nuclear Force?
Podcast Episode by Heather Williams and Lachlan MacKenzie — April 3, 2025

Escalation as a Path to Peace: Risk Tolerance and Negotiations in Ukraine
Podcast Episode by Lachlan MacKenzie — December 19, 2024

Escalation as a Path to Peace: Risk Tolerance and Negotiations in Ukraine
Commentary by Lachlan MacKenzie — December 9, 2024
Report Launch: Project Atom 2024
Event — November 20, 2024
Project Atom 2024: Intra-War Deterrence in a Two-Peer Environment
Report by Heather Williams, Reja Younis, Lachlan MacKenzie, Christopher A. Ford, Rebecca Davis Gibbons, Ankit Panda, Melanie W. Sisson, and Gregory Weaver — November 18, 2024
PONI 2024 Fall Conference
Event — September 27, 2024