Dr. Gretchen L. Gierach earned both her M.P.H. and Ph.D. degrees in epidemiology from the University of Pittsburgh, with a focus on cancer epidemiology and women’s health. She joined the Division as an NCI Cancer Prevention Fellow, continued as a tenure-track investigator, and was awarded tenure in 2017. She served as Deputy Chief of the Integrative Tumor Epidemiology Branch from 2018 through 2020 and was appointed Chief in 2021. She also serves as chair of the Division’s Breast Cancer Working Group and co-chair of the DCEG Hormone Laboratory Advisory Committee. She is the recipient of the DCEG Molecular Epidemiology Research Funding Award, the NCI Merit Award in Cancer Prevention Research Training, and the Award to Advance Research on Cancers in Women from the NCI Office of Science Planning and Assessment and the NIH Office of Research on Women’s Health. Her research topics mainly include molecular mechanisms, breast carcinogenesis, mammographic density, and the etiology of hormonally-related female cancers.
Dr. Rebecca Troisi received a Sc.D. from the Harvard School of Public Health in 1994 and joined NCI the same year. She currently serves as Assistant Director of the Trans-Divisional Research Program in the Division of Cancer Epidemiology and Genetics. Her research focuses on the hormonal etiologies of reproductive cancers and the role of maternal, gestational, neonatal, and early life factors in breast cancer risk, including endocrine disruptors such as diethylstilbestrol, a drug previously given to pregnant women. She received NIH Merit Awards in 2011 and 2012. She has published more than 160 publications in peer-reviewed journals with an h-index of 48 (Scopus, June 2024).
