Professor Captain teaches courses related to Latin America and International Affairs at The George Washington University. She is an expert on the African Diaspora, and South-South relations, particularly between Latin America and Africa. Her other research and practical expertise lies in the internationalization of college campuses. This latter knowledge is honed in her capacity as former Executive Director of Phi Beta Delta Honor Society for International Scholars, which boasts a membership of over 175 colleges and universities. Currently she serves as that bodies regent. In addition, she is a former member of the Advisory Board of the United Nations Association of the Capital Area. She has published, interviewed, and lectured widely on the subjects of internationalization, south-south relations, and the African Diaspora. She is an active participant in issues of shared governance at the university level, having served as a member of The George Washington University's Faculty Senate and on the Dean's Council.