Mariella Cellitti TEFFT is a biostatistician and a nurse. She was a research biostatistician at the Lombardi Cancer Center at Georgetown University in Washington, D.C. for seven years, co-led a mortality study of women 15-49 years who died in Georgia in 2006 for John Snow, Inc. (JSI), and evaluated JSI's Maternal and Infant Health Program in Ukraine for USAID in 2010-2011. She is the co-author of 47 professional articles. She served with her husband Ambassador John F. Tefft during his 45-year U.S. Foreign Service career, which included his four ambassadorial assignments in Russia, Ukraine, Georgia, and Lithuania. Earlier foreign assignments were in Moscow (with John as Deputy Chief of Mission), Rome, Budapest, and Jerusalem. In addition to working with her husband in carrying out official U.S. Government duties, Mariella Tefft held positions as embassy and university nurse and worked with other non-government organizations, such as the American International Health Alliance (AIHA) in Moscow and the United Nations Development Program (UNDP) in Vilnius. She has two daughters and two granddaughters.