Postdoctoral Fellows

HCP HMS LogoHoward Liu, ScD













Victor Puac-Polanco, MD, DrPHPhoto of Victor Puac-Polanco

Dean’s Postdoctoral Fellow

Victor currently works in the translational implications of detecting and treating behavioral health problems in low- and middle-income countries. He is also interested in injury epidemiology, specifically in the effects of alcohol policy. He received his Medical Degree from Universidad de San Carlos de Guatemala in 2009, his Master of Science in Clinical Epidemiology from the Perelman School of Medicine at the University of Pennsylvania in 2012, and his Doctor of Public Health from Columbia University Mailman School of Public Health in 2020.


Photo of Hannah ZiobrowskiHannah N. Ziobrowski, PhD, MPH

Dr. Ziobrowski’s research focuses on the causes, courses, and treatment of psychiatric disorders. Her work examines the epidemiology of mental disorders, the impact of stress and trauma across the life course, and the influence of psychiatric comorbidities on the development and treatment of mental disorders. Dr. Ziobrowski earned her PhD in Epidemiology from Brown University in 2020 and her Master of Public Health from Washington University in St. Louis in 2016.