Your browser (Internet Explorer 7 or lower) is out of date. It has known security flaws and may not display all features of this and other websites. Learn how to update your browser.


ADST Staff

President – Susan Rockwell Johnson is a career member of the Senior Foreign Service with over three decades of distinguished service and serves as the President of ADST.  She served in a broad range of bilateral and multilateral assignments in and out of the State Department including in Bosnia as Deputy High Representative and Supervisor of Brcko District, in the Coalition Provisional Authority in Baghdad as the Senior Advisor to the Iraqi Foreign Ministry, as Deputy Chief of Mission and Charge d’affaires in Romania and Mauritius, as well as in Russia, Cuba, Pakistan, the United States Mission to the United Nations, several assignments in the State Department, on the Hill and with the National Endowment for Democracy. As the elected President of the American Foreign Service Association (AFSA) from 2009 to 2013, Ms. Johnson focused on the Foreign Service labor-management issues key to the Foreign Service. Following her two terms as AFSA President, Ms Johnson was detailed to the American Academy of Diplomacy as a Senior Advisor to provide her expertise and work on the Academy’s recently released report “American Diplomacy at Risk”.Prior to entering the Foreign Service, Ms. Johnson worked in the private sector in the areas of strategic planning, international marketing and joint venture negotiation.  She has a B.A. in History (Summa cum Laude) from Principia College and an M.A. in International Relations from the Johns Hopkins School of International Studies (SAIS).  She is married to Ambassador Riaz M Khan, retired Pakistani diplomat and former Foreign Secretary of Pakistan.  She serves on the Boards of the Diplomacy Center Foundation and the Chestnut Hill Benevolent Association in Boston, Massachusetts.

Executive Director – Nathan Holt was named executive director of the Association for Diplomatic Studies and Training (ADST) in 2017. Prior to joining ADST, Holt was interim Deputy Chief of Mission and charge d’affaires at our Embassy in Bamako, Mali.  From 2015 to early 2017, Holt was  deputy director in the Office of West African Affairs at the U.S. State Department.  His unit had principal responsibility for Nigeria, Africa’s most populous country and second largest economy.  From 2012 to 2015, Holt was the Senior Foreign Policy Advisor to the Commander of the United States Africa Command (AFRICOM), based in Stuttgart, Germany.  In that capacity, he travelled to more than 40 countries in Africa and Europe, ensuring that AFRICOM’s efforts were consistent with U.S. policy and well-coordinated with our partners.  A career officer in the United States Foreign Service, Holt previously served as Deputy Principal Officer at the United States Consulate in Cape Town, South Africa (2009-11) and Deputy Chief of Mission at the U.S. Embassy in Libreville, Gabon (2007-09).  Holt has served as a consular officer in Senegal, a public affairs officer in Cape Town, and a political officer in Gambia, Kenya and Uganda.  From 2006 to 2007 he was part of the first team of U.S. personnel opening a consulate in Juba, South Sudan.  He has served as charge d’affaires at four different posts

Prior to becoming a diplomat, Holt was Executive Director of the United States-Angola Chamber of Commerce (1994-95).  A lawyer, Holt practiced international trade law in Washington, D.C.  He has also worked as a research assistant at the World Bank and as news editor of a weekly newspaper.  As a Peace Corps volunteer in Botswana (1980-83) he worked for a development bank and for Botswana’s Ministry of Finance.  Holt earned a juris doctor degree from the University of Virginia, and a master of arts in African History from Northwestern University.  He received an undergraduate degree in History, magna cum laude, from Boston College.  He has published in the Virginia Journal of International Law, and has authored or co-authored opinion pieces in the New York Times and the Wall Street Journal.  Holt has received five individual Superior Honor Awards from the U.S. State Department, and the Joint Meritorious Civilian Service Award from the Department of Defense.

Oral History Director – Charles Stuart Kennedy has been director of the Foreign Affairs Oral History Program since its inception in 1985. A career officer in the US Foreign Service from 1955 to 1985, he retired with the rank of Minister Counselor. Mr. Kennedy was consul general in Naples, Italy (1979-81), Seoul, South Korea (1976-79), Athens, Greece (1970-74) and Saigon, South Vietnam (1969-70). He was educated at Williams College (BA) and Boston University (MA). He is the author of The American Consul: A History of the United States Consular Service 1776-1914, and co-author of The U.S. Consul at Work and American Ambassadors in a Troubled World. He was awarded the Foreign Service Cup from the Director General of the Foreign Service in 1997 for his work as an oral historian. In June 2014 the American Foreign Service Association (AFSA) gave him the Award for Lifetime Contributions to American Diplomacy in recognition of his distinguished Foreign Service career and a lifetime of public service. Previous recipients of this prestigious award include George H.W. Bush, Lawrence Eagleburger, Cyrus Vance, Thomas Pickering, George Shultz, and Richard Lugar. In 1986, after retiring from the Foreign Service, Stu became managing director of The George Washington University’s Foreign Service History Center. There he created the Foreign Affairs Oral History Collection and began recording the insights and experiences of American diplomats. The program moved to Georgetown University and then, in 1988, to ADST. In that capacity, he has personally interviewed more than 1,000 retired American diplomats, some of whose careers date back to the 1920s.

Deputy Oral Historian –  Mark Tauber completed a career in the U.S. Foreign Service in 2013 divided evenly between political affairs and public diplomacy.  As a Political Officer, Mark worked on refugee issues in Central America, conventional arms control in Europe at the OSCE, and in Armenia, on the Nagorno-Karabakh dispute.  In Public Diplomacy, Mark received Meritorious Honor Awards for his work as a Cultural Officer in Romania and Hungary.  In Costa Rica, as Public Affairs Officer, he expanded Embassy San Jose’s Facebook followers from 2500 to 150,000, began use of Twitter — reaching 10,000 followers in two years, and introduced live streaming of Embassy events.  During his final year as Director of the Office of American Spaces in the State Department, Mark authored an article on the history of American cultural/educational centers.  Before joining the staff of ADST in 2016, Mark received his teaching certification from the Commonwealth of Virginia in 2014 and served as a volunteer instructor with the Literacy Council of Northern Virginia.  Mark’s degrees are in Diplomatic History (B.S., 1981) and Business Diplomacy (M.S., 1984) from Georgetown University.  He was also awarded a Master’s Degree in National Security Resourcing from the Industrial College of the Armed Forces.  Mark speaks Spanish and French.

Office/Business Manager – Jennifer Kobb joined ADST in April 2019. As the spouse of a Foreign Service Officer, she has lived and worked in Ukraine, The Bahamas, Afghanistan and Austria. She currently lives in Alexandria, Virginia, where she enjoys walking her dog and sewing. At ADST, Jennifer is responsible for day-to-day business management, including financial accounts, membership, tax, payroll and budgetary matters.





Publishing Director – Margery B. Thompson directs ADST’s book-related programs, advises diplomats and others on editing and publishing matters, and coordinates the ADST-DACOR Diplomats and Diplomacy Series. Before joining ADST in 1995, she was director of publications and editor at the Georgetown University Institute for the Study of Diplomacy (ISD) from 1980 to 1994. At ISD she was coeditor and compiler (with Smith Simpson) of Education in Diplomacy: An Instructional Guide (ISD/University Press of America, 1987) and editor of As Others See Us: United States Diplomacy Viewed from Abroad (ISD, 1989) and Beacons: Great Teachers of the Georgetown School of Foreign Service (SFS/Georgetown University, 1994). She collaborated with ISD authors and publishers in the development, editing, and publication of many other ISD books, reports, and monographs and is now doing the same for ADST. Her previous appointments included the Institute of International Education, the Brookings Institution, the University of Pittsburgh Center for Regional Economic Studies, and the Pittsburgh Commission on Human Relations. She was educated at Northwestern University, the University of Pittsburgh, and George Washington University.


Lisa Terry joined ADST as a Program Officer in 2018; she is also an editor of ADST’s Memoirs and Occasional Papers Book Series.  She joined the Foreign Service in 2007 and has served as a consular officer in Islamabad, Istanbul, Singapore, Suriname, Estonia, and Manila.  A lifelong lover of history, Lisa has a BA in Classical Archaeology from the University of California at Santa Barbara and an MA in Art History from California State University at Dominguez Hills.  She also did graduate work at Bilkent University in Ankara, Turkey.





 Oral History Program Assistant – Heather Ashe joined ADST in February of 2019. She has a M.A. from George Washington University in Museum Studies, with a focus on collections management and interpretation. She received her B.A. from Skidmore College in History and Art History. Heather is originally from Connecticut, where she served as a board member for the Prospect Historical Society and volunteered at its historic sites in her hometown. After relocating to Virginia, Heather has held internships at the Workhouse Prison Museum in Lorton, VA and with the Ichthyology Department at the Smithsonian National Museum of Natural History in D.C. Heather also held a position as an Asian Art specialist and cataloger at Oakridge Auction Gallery previous to joining ADST. As the Oral History Program Assistant Heather is assisting in the management and processing of oral histories. Heather now resides in Alexandria Virginia and is a lifelong equestrian.

ADST Presidents

Susan R. Johnson, 2016-
Chris Sibilla, 2015-2016
The Honorable Kenneth L. Brown, 2001-2014
The Honorable Edward M. Rowell, 1997-2001
The Honorable Stephen Low, 1992-1997
The Honorable Thomas Boyatt, 1989-1992
The Honorable Richard B. Parker, 1986-1989

ADST Executive Directors

Nathan Holt, 2017-
Judith Baroody, 2015-2017
Chris Sibilla, 2012-2015
James Warren, 2011–2012
John Naland, 2010-2011
Vicente Valle, 2009-2010
Les McBee, 2007-2009
Dan Whitman, 2006-2007
Marilyn Bruno, 2006
Jack Zetkulic, 2004-2006
Veda Engel, 2002-2004
LW Koengeter, 2000-2002
John Miller, 1999-2000
Richard Jackson 1998-1999
Dennis Kux 1993-1994
Eugene Bovis 1987-1988