Assistant Director, Counterintelligence Division
Federal Bureau of Investigation, U.S. Department of Justice
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Office Head, Office of International Science and Engineering
National Science Foundation
Deputy Director for Extramural Research
National Institutes of Health, U.S. Department of Health and Human Services
Director, Office of Science
U.S. Department of Energy
Deputy Assistant Secretary for Visa Services
Bureau of Consular Affairs, U.S. Department of State