Contact Sister Cities International

915 15th Street NW
4th Floor
Washington, DC 20005

Staff Contacts

Executive Staff


President & CEO

Roger-Mark De Souza most recently led efforts to engage international and U.S. partners on key diplomatic, development, and security issues as Director of Programs on global sustainability and resilience for the congressionally established Woodrow Wilson Center. Previously, De Souza served as Vice President of Research at PAI, a global health organization, and as Director of Foundation and Corporate Relations for the Sierra Club where he managed a highly successful corporate and foundation fundraising campaign through its 65 volunteer chapters. Prior to his experience at PAI and the Sierra Club, he worked at the Population Reference Bureau and the World Resources Institute where he designed and implemented projects in the USA, Africa, Southeast Asia, and Latin America and the Caribbean. De Souza holds graduate degrees in international relations and development policy from George Washington University and the University of the West Indies in Trinidad and Tobago.

Vice President
Adam Kaplan first joined Sister Cities International in 2008 as the Program Coordinator for the Iraqi Young Leaders Exchange Program before becoming Membership Director in 2012. He is responsible for member services, recruitment, and policies at Sister Cities International. Adam received his BA in English from Georgetown University and his MA in International Communication from American University. He is originally from Cincinnati in the great state of Ohio.

Executive Assistant

Shelby Bunker is responsible for assisting the President and CEO, Vice President, and staff of Sister Cities International. She received her Bachelor of Science degree in Criminal Justice from the University of Maryland, and was born in Washington, DC and raised in Southern Maryland. 


Member Manager (Youth Programs)
Alyssa Fox oversees Sister Cities International's youth programs including: High School Homestay, the Young Artists and Authors Showcase, and the Youth Leadership Summit. She also manages the J-1 Exchange Visitor Program. Originally from Connecticut, she received her B.A. in International Relations and Spanish/Latin American Language and Area Studies from American University and her M.A. in International Education from The George Washington University. 

Membership Manager
Shakarra McGuire serves as the Membership Manager and oversees recruitment, renewals, and general member requests. Shakarra comes from a nonprofit background specializing in communications and audience relations. She graduated from the University of Alabama with a bachelor’s degree in Public Relations.

New Partnerships Consultant
Taylor Woodruff oversees Sister Cities International’s Cities Seeking Cities program and works with communities on developing and expanding their sister city programs. He is originally from Jonesboro, Arkansas and graduated from Arkansas State University with a bachelor’s degree in International Business. 

Finance and Administration

Director of Finance and Administration

Shambhavi Thakur
Revenue Manager
Shambhavi Thakur serves as Revenue Manager, assisting the Director of Finance and Administration and the Director of Development. She oversees the collection, processing, and reporting of revenue and works in conjunction with the Fund Development and Finance Committees.


Sister Cities International Development

Tricia Lloyd brings over 20 years of non-profit fundraising experience to Sister Cities International. She has consulted for numerous organizations, including local, national, cultural, religious, and community oriented, to improve their development programs. Tricia looks for creative ways to help small development budgets go far. Her previous positions have included Vice President of Institutional Advancement for The Institute of World Politics, a graduate school in Washington, DC for international relations and Executive Director of the U.S. Office of the Pontifical North American College, which is the American seminary in Rome, Italy. 


Communications Manager

Christina serves at the Communications Manager and oversees all external communications on behalf of Sister Cities International. Originally from Maryland, she received her B.A. in English Literature at High Point University.

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This year marks a pivotal moment during which Sister Cities International is celebrating 60 years of peace through people. Get involved in this momentous year.
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As the world becomes smaller, and connections online become more frequent than face-to-face interactions, multicultural understanding at the community level is more important than ever. Sister Cities International enables citizen diplomats in communities across the world to develop relationships with communities in other countries that are based on cultural understanding and mutual cooperation.Donate