From 2004 to 2012, the Fogarty International Clinical Research Scholars/Fellows Program (FICRS-F) provided 1-year research training opportunities for U.S. and international doctoral "Scholars" and postdoctoral "Fellows" at low- and middle-income country (LMIC) centers. We collected data prospectively and then surveyed a representative sample of 100 alumni (94% response), assessing Program impacts on their careers and collaborations. Frequently, collaborations continued beyond the formal training period with U.S.- (63%) and site-based mentors (66%). U.S. Fellows reported the highest post-training focus on research (88 on a 100-point scale), and the highest Program impact on competitiveness for career or training positions and choices of post-training topics and institutions (95 points). Interest in global health research increased markedly during the training period, especially for LMIC trainees, and was sustained post-training. LMIC alumni reported a significantly higher focus on global health and research than did U.S. alumni. Alumni reported that their mentored research training had a substantial impact on their career trajectories.