sentences:  He retired from the State Department in 2002 and became professor of politics and international relations at Ursinus College, his alma mater.In his post-foreign service career, he became a Senior Consultant in the Office of the Secretary of State's Coordinator for Counterterrorism and served as the Acting U.S. Representative for Management and Reform to the United Nations at the United States Mission.In late 2006, he became a Senior Advisor to the U.S. Delegation to the 61st U.N. General Assembly, continuing this role in the 62nd and 63rd assemblies.