Cynthia LeardMann has been a researcher with the Millennium Cohort Study for almost 13 years. She is a senior epidemiologist for the Henry M. Jackson Foundation at the Naval Health Research Center, San Diego. Cynthia earned her Bachelor’s degree in biology from UCSD and Master’s in Public Health from SDSU. Her research focuses on the psychological health and sexual trauma of US Service members, Veterans, and their families. She is also an investigator of the Millennium Cohort Family Study and Recruit Assessment Program. The Millennium Cohort Study is the largest longitudinal study of service members and veterans. The study was designed in the late 1990s to address veteran and public concerns for the first time using prospectively collected health and behavioral data. Since 2001, over 200,000 active duty, Reserve, and National Guard personnel from all service branches have enrolled in the study. Survey data from participants, collected every 3 years, is linked to objective data sources. Results from the Millennium Cohort Study help to guide public health policy and strategies for service members and veterans. This talk will provide an overview of the study and discuss the impact of sexual harassment and sexual assault on service members and veterans.