Mark Fitzpatrick is an associate fellow at the IISS. Until the end of 2018, he was Executive Director of IISS-Americas and director of the Institute's Non-proliferation and Nuclear Policy Programme. Prior to joining IISS in 2005, he was a career US Foreign Service Officer.

Michael Elleman is Senior Fellow for Missile Defence at the IISS and the principal author of the IISS Strategic Dossier Iran's Ballistic Missile Capabilities: A net assessment. He previously worked as a missile expert for weapons inspection missions in Iraq and spent two decades as a scientist at Lockheed Martin.

Paulina Izewicz is a Senior Research Associate with the James Martin Center for Nonproliferation Studies at the Middlebury Institute of International Studies at Monterey. Until spring 2018, she managed programmatic work on sanctions and led a Track 1.5 dialogue with Iran for the IISS.