Catherine McArdle Kelleher is professor emeritus of strategic research at the Naval War College, Newport, Rhode Island, and adjunct professor at the Watson Institute for International Studies at Brown University. She has served the US government as President Bill Clinton's deputy assistant secretary of defense for Russia, Ukraine, and Eurasia and as the secretary of defense's representative to NATO in Brussels. She was also on President Carter's National Security Council staff. She is a former senior fellow of foreign policy studies at the Brookings Institution, and she directed the Aspen Institute, Berlin. She was the first president of Women in International Security.

Kelleher founded the Center for International and Security Studies at Maryland University. Kelleher has taught and written extensively on conventional and nuclear arms control as well as on German, Russian, and European security issues. She received a DLitt from Mt. Holyoke College and a PhD from the Massachusetts Institute of Technology.