Prior to his current appointment, he was an Assistant Professor in the School of American and International Studies at Ramapo College of New Jersey. His publications include "Structure and Perceptions: Explaining American Policy toward China (1949–50)", Security Studies, Vol. 16, No. 4 (December 2007) "Structural Realism and Dulles's China Policy," Review of International Studies, Vol. 38, No. 1 (January 2012); "Breaking the Nuclear Deadlock: Global Action Plan to Denuclearize North Korea," The Washington Quarterly, Vol. 37, No. 3 (Fall 2014) (with Duk-min Yoon); "U.S.-China Relations and Korea's Strategy", IFANS Analysis of International Affairs (February 2016).