Samuel Charap is a senior political scientist at the RAND Corporation. His research interests include the foreign policies of Russia and the former Soviet states; European and Eurasian regional security; and U.S.-Russia deterrence, strategic stability, and arms control.

From November 2012 until April 2017, Charap was the senior fellow for Russia and Eurasia at the International Institute for Strategic Studies. Prior to joining the IISS, he served at the U.S. Department of State as senior advisor to the undersecretary for Arms Control and International Security and on the Secretary’s Policy Planning Staff, covering Russia and Eurasia. From 2009 to 2011, Charap was director for Russia and Eurasia at the Center for American Progress.

Charap's book on the Ukraine crisis, Everyone Loses: The Ukraine Crisis and the Ruinous Contest for Post-Soviet Eurasia (coauthored with Timothy Colton), was published in January 2017. His articles have appeared in The Washington Quarterly, Foreign Affairs, Survival, Current History and several other journals.

Charap was a visiting scholar at the Carnegie Moscow Center and the International Center for Policy Studies (Kyiv), and a Fulbright Scholar at the Moscow State Institute of International Relations. He is fluent in Russian and proficient in Ukrainian. Charap holds a Ph.D. in political science and an M.Phil. in Russian and East European studies from the University of Oxford, where he was a Marshall Scholar. He received his B.A. in Russian and political science from Amherst College. He is a life member of the Council on Foreign Relations.