Dr. Tien is Professor of Medicine at the University of California, San Francisco, and Chief of the Infectious Diseases Division at the San Francisco VA Health Care System. Her research program investigates how chronic viral infections—particularly HIV and HCV—and their associated metabolic and immune perturbations drive long-term organ injury in adults, with a primary focus on women.
She has held key national leadership roles, including Co-Chair of the Executive Committee and member of the Steering Committee for the Multicenter AIDS Cohort Study (MACS)/Women’s Interagency HIV Study (WIHS) Combined Cohort Study (MWCCS), which unites two of the largest and longest-running NIH-funded prospective cohorts of adults with, and at risk for, HIV in the United States. Additional appointments include Chair of the Inter-CFAR Collaboration on HIV Research in Women; Chair of the External Scientific Advisory Committee for the NICHD-funded Pediatric HIV/AIDS Cohort Study; and membership on the Scientific Advisory Committee for the Study of Treatment and Reproductive Outcomes (STAR) in women with and without HIV, and the External Scientific Advisory Board for the Building Interdisciplinary Research Careers in Women's Health (BIRCWH) K12 Program at Emory University.
Her government and professional service includes chairing the NIH AIDS Clinical Epidemiology Study Section and serving on the Department of Health and Human Services Antiretroviral Guidelines Panel, the NIAID AIDS Research Study Section, the NIH COVID-19 Treatment Guidelines Panel, and the Infectious Diseases Society of America COVID-19 Treatment Guidelines Panel.