Meet the Leadership Team


Nancy McEldowney

Ambassador Nancy McEldowney was appointed Director of MSFS on July 1, 2017. Prior to MSFS, Ambassador McEldowney served as Director of the Foreign Service Institute (FSI) and Ambassador to the Republic of Bulgaria.

As Director of FSI, Ambassador McEldowney led the foreign affairs training facility for the U.S. government, which offers 800 courses and enrolls approximately 170,000 annually.  She was responsible for FSI’s 1,400 staff, worldwide field operations, and $130M operating budget. Ambassador McEldowney also served as Interim President and Senior Vice President of the National Defense University, the U.S. Department of Defense’s national security university.

Ambassador McEldowney has been a leading policy advisor on Europe. She served President Clinton as Director of European Affairs on the White House National Security Council Staff. She also served as Principal Deputy Assistant Secretary in the Bureau of European and Eurasian Affairs, where she led the U.S. government engagement with NATO, the European Union, and the Organization for Security and Co-operation in Europe (OSCE).

Ambasador McEldowney’s distinguished career as a foreign service officer included positions as U.S. Ambassador to the Republic of Bulgaria and as Chargé d’Affaires and Deputy Chief of Mission in Turkey and Azerbaijan.

She has been granted the State Department’s Superior Honor Award on five occasions. She is also the recipient of the Sinclair Linguistic Award and of the Chairman of the Joint Chief’s Joint Distinguished Civilian Service Award.

TV & Radio Appearances


Print Interviews

Downloadable photo of Amb. McEldowney

Downloadable photo of Amb. McEldowney 2




Rachel works closely with Associate Director in developing relationships with external organizations in the public, private, and nonprofit sectors in the U.S. and abroad. In addition, she provides support to students in all aspects of their internship search by conducting workshops on internship and career searches, holding one-on-one advising sessions, providing written recommendations, and more. She also organizes MSFS DC Days and the NYC Trip.  

Before joining the MSFS program, Rachel worked at the University of Michigan as the Program Coordinator in their Confucius Institute and most recently as the Graduate Coordinator serving PhD students in the Electrical Engineering and Computer Science department. She has also spent a considerable amount of time living and working abroad, namely in Taipei, Taiwan and Beijing, China.  

Rachel earned her M.A. in Higher Education from the University of Michigan and a B.A. in International Affairs from James Madison University.




Brian Cain works with the entire staff to plan recruitment activities, organize admissions events, and help coordinate yield activities for admitted students.  Brian also represents the MSFS program at recruitment events around the country.  

Prior to joining the MSFS Program, Brian worked in Academic Advising at the Smith School of Business at the University of Maryland.  He also knows the Georgetown Community well with previous work experience at the McDonough School of Business and the Division of Student Affairs here on the Hilltop.  
Brian is Jesuit educated with a B.A from John Carroll University and has an M.Ed. from Duquesne University.



Ja’net Y. DeFlorimonte, Director of Admissions


Ja'net is responsible for all matters pertaining to recruitment, admissions, scholarship, and advertising. She meets with prospective students, counsels applicants, and works with the Admissions Committee in making admissions decisions. Ja’net also designs and implements the annual outreach strategy, which includes domestic and international recruitment through travel, advertising, marketing, and special events. In addition, she works closely with the Graduate School in the management of applications and awarding of merit-based scholarships.

Before joining MSFS, Ja’net was the Administrative Director for the North American Office of the Medical School for International Health at Ben-Gurion University of the Negev, where she oversaw admissions, recruitment, fourth year clinical elective partnerships, and public relations. Prior to that, she worked with National Medical Fellowships, Congressional Black Caucus Foundation, and the Institute of International Education.

Ja’net earned her M.P.A. with a concentration in International Management from American University and her B.A. in Political Science with a minor in International Studies from Wake Forest University.




Erin oversees academic and alumni affairs for the Master of Science in Foreign Service program. In addition to supporting students, faculty, and alumni, Dr. Guild supports the efforts of the MSFS Advisory Board as it serves to strengthen the program's academic and professional opportunities. Dr. Guild works closely with the Director of Academic Affairs, the Assistant Director of External Affairs, and the Communications and Events Coordinator. He also serves on the MSFS Admissions Committee.

Prior to joining the MSFS program, Dr. Guild served as Director of Admissions and Registrar to the School of Advanced International Studies of The Johns Hopkins University. He has worked in institutions of higher education since 1997. Prior to that, Dr. Guild worked as an aide on the United States Senate Committee on Labor and Human Resources.

Dr. Guild earned his Ph.D. in Education with an emphasis in Higher Education Leadership from Colorado State University; a Master of Public Relations & Corporate Communications from Georgetown University; a Master of Science in Student Affairs in Higher Education degree from Colorado State University;  and a Bachelor of Arts degree from the State University of New York at Binghamton. 




Mei-Ling is responsible for the oversight and management of all program funds, human resources administration, and facilities and technology management.

For nearly three years, Mei-Ling served as the Program Administrator for the Global Human Development Program at Georgetown. Prior to coming to the School of Foreign Service, she held several administrative positions in the McDonough School of Business. Before Georgetown, Mei-Ling spent a decade in Switzerland in a variety of academic administrative positions, including Associate Director of External Relations and Director of Admissions at the Leysin American School and Director of Annual Giving at the American School of Switzerland. She also served for seven years as the Director of Admissions and Financial Aid at the American School in Japan. Mei-Ling holds an M.S. in Business Education from the University of Southern Illinois and a B.A. in English Literature from Tamkang University in Taiwan.




Sarah works with faculty and students on course offerings, registration, degree requirements, and progress toward graduation for the program. She serves as academic advisor for students pursuing joint degrees with MSFS and works closely with the MSFS Student Representatives to enhance the student experience. Sarah also manages the MSFS Oral Exams and New Student Orientation. 

Before MSFS, Sarah spent four years working in the Office of Undergraduate Studies at The George Washington University, most recently as Associate Director. Prior to her time at GW, Sarah worked at the Center for Academic Advising and First Year Programs at Lasell College and previously served in the Office of Career Services at the Fletcher School of Law and Diplomacy at Tufts University. Sarah holds an M.Ed. in Higher Education from Harvard University and a B.A. in English Literature and Philosophy from the University of Vermont.




Concentration Chairs


Nicole Bibbins Sedaca

Professor Bibbins Sedaca serves as the Chair for the Global Politics and Security Concentration in Georgetown University’s Master of Science in Foreign Service (MSFS) program and is a Professor in the Practice of International Affairs in MSFS. Professor Bibbins Sedaca has held numerous positions in the public and non-governmental sectors in the United States and Ecuador. She served for ten years in the United States Department of State, working on democracy promotion, human rights, human trafficking, religious freedom, refugees, and counterterrorism. During this time, her positions included: the Senior Advisor to the Under Secretary of State for Democracy and Global Affairs, the Senior Director for Strategic Planning and External Affairs in the Bureau of Democracy, Human Rights and Labor, and the Special Assistant to the Ambassador-At-Large for Counterterrorism. Following her governmental service, she opened and directed the International Republican Institute’s local governance program in Ecuador. She also taught at the Universidad de San Francisco de Quito (Ecuador) on democratization and conflict resolution. She also co-led the USFQ Model United Nations team that won several awards in April 2009. Prior to returning to Georgetown full-time, she served as the Director of the Washington Office of Independent Diplomat, a diplomatic advisory group.

Professor Bibbins Sedaca holds a Master’s degree from Georgetown University’s School of Foreign Service and a Bachelor’s degree in International Relations from The College of William and Mary, where she was a Presidential and Monroe Scholar. She studied at Humboldt Universitaet in Berlin, Germany, while on a Rotary International Scholarship. In 2015, she was awarded Georgetown’s 1820 Graduate Award for outstanding leadership and service by graduate alumni to the Georgetown alumni community. She has earned three Superior Honor Awards and a Meritorious Honor Award from the U.S. Department of State. While at Georgetown, she received the Dean’s Citation and Dean’s Award for Academic Excellence, and also was a Georgetown University Scholarship Recipient, Dorothy Danforth Scholarship Recipient and Edward Weintal Distinguished Scholar. She serves at the Chairperson of the Board of the International Justice Mission, a non-governmental organization fighting human trafficking and violence against the poor. She has served as the Chair of the Board of the Institute for Global Engagement, a non-governmental organization promoting religious freedom overseas, and also served on the Board of Georgetown’s School of Foreign Service, the William and Mary Fund and the William and Mary Washington Office.

TV & Radio Appearances


Downloadable photo of Professor Bibbins Sedaca



Erwin Tiongson

Professor Tiongson was a Senior Economist at the World Bank for Latin America and the Caribbean Region. Prior to that, he worked at the Bank for the Europe and Central Asia Region. Professor Tiongson has also been an Associate Professor at the Asian Institute of Management in Metro Manila in the Philippines. He is the author or co-author of numerous publications, including three World Bank books, Back to Work: Growing with Jobs in Europe and Central Asia; The Crisis Hits Home: Stress Testing Households in Europe and Central Asia; and Growth, Poverty and Inequality: Eastern Europe and the Former Soviet Union.

Professor Tiongson holds a Ph.D. and M.Phil. in Economics from The George Washington University, an M.P.P. from the McCourt School of Public Policy at Georgetown University, an M.A. in Economics from Fordham University, and a B.A. in Philosophy from Ateneo de Manila University in the Philippines. 




david wallis

Professor Wallis is Professor in the Practice of International Affairs and Concentration Chair for Global Business and Finance, MSFS.

Prior to joining the MSFS leadership team, Professor Wallis engaged in a global business career working within the financial services industry. This experience was geographically based in London, New York and Tokyo and has included senior executive positions in insurance, investment banking and asset management. Specifically within the insurance industry, Professor Wallis was the Chief Risk Officer and subsequently President and Chief Executive Officer of Ambac Inc., a New York Stock Exchange Company where he also sat on the Board of Directors. Subsequently Professor Wallis worked at AIG both in New York and Tokyo, and was latterly responsible for AIG’s Regional Financial Planning & Analysis Groups based in Tokyo.

Professor Wallis holds an Honors Degree in Economics from Downing College, Cambridge, an MBA from the City University Business School, London and attended the Program for Manager Development at the Fuqua School of Business, Duke University. He also qualified MCT under the Association of Corporate Treasurers in the UK. Professor Wallis served as an Adjunct within Georgetown’s MSFS program in 2012 and 2013.