| Holmes, David A. | Political Counselor, U.S. Embassy in Kyiv, Ukraine, August 2017-present |
| Johnson, Ron | Senator from Wisconsin, Chairman, Senate Homeland Security and Governmental Affairs Committee, January 2015-present |
| Kellogg, Keith | National Security Advisor to the Vice President, April 2018-present |
| Kenna, Lisa D. | Executive Secretary in the Office of the Secretary, Department of State, June 2017-present |
| Kent, George P. | Deputy Assistant Secretary of State, Bureau of European and Eurasian Affairs, September 2018-present; Deputy Chief of Mission in Kyiv, Ukraine, 2015-2018 |
| Kholodnitsky, Nazar | Head, Ukrainian Specialized Anti-Corruption Prosecutor's Office, November 2015-present |
| Klitenic, Jason | General Counsel, Office of the Director of National Intelligence |
| Kulyk, Kostiantyn | Deputy Head of the Ukrainian Department of International Legal Cooperation of the Prosecutor General's Office, November 2018-November 2019 |
| Kupperman, Charles M. | Deputy National Security Advisor, January 2019-September 2019 |
| Kushner, Jared | Assistant to the President and Senior Advisor, 2017-present |
| Kvien, Kristina | Deputy Chief of Mission, U.S. Embassy in Kyiv, May 2019-present |
| Lutsenko, Yuriy | Ukrainian Prosecutor General, May 2016-August 2019 |
| McCormack, Brian | Associate Director for Natural Resources, Office of Management and Budget, September 2019-present; Chief of Staff, Department of Energy, March 2017-September 2019 |
| McKinley, P. Michael | Senior Advisor to the Secretary, Department of State, May 2018-October 2019 |
| McKusker, Elaine A. | Deputy Under Secretary of Defense (Comptroller), Department of Defense, August 2017-present |
| Maguire, Joseph | Acting Director of National Intelligence, August 2019-present |
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