Our team
Principal Investigator
Hannah Greenwald Healy, Ph.D.
Dr. Hannah Healy is an Assistant Professor of Environmental Health and Exposure Science within the Department of Environmental Health at the Harvard T.H. Chan School of Public Health. Hannah is from Atlanta, GA and received her B.S. in Environmental Engineering from Georgia Tech. She later received her M.S. and Ph.D. in Environmental Engineering from the University of California, Berkeley and was appointed as a Gaylord Donnelley Postdoctoral Associate in the Department of Chemical and Environmental Engineering at Yale University. Dr. Healy was a recipient of the NSF Graduate Research Fellowship, the NWRI WateReuse Fellowship, the AWWA American Water Scholarship, and the Berkeley CEE Outstanding Graduate Student Instructor Award.
Dr. Healy’s research focuses on pathogens and microbiomes of engineered water systems to inform water management/treatment, infectious disease surveillance, and healthcare infection prevention. She was inspired to study water and environmental exposures after a series of outbreaks of waterborne illness in her community while living in Panama. Outside of work, Hannah loves traveling, hiking, SciFi novels, and cozy coffee shops.
hannahhealy@hsph.harvard.edu — Catalyst Profile — Harvard Webpage
Postdoctoral Scholar
Amanda Darling, Ph.D.
Amanda earned her PhD in Civil Engineering (Environmental and Water Resources Engineering Program) at Virginia Tech in 2024. Amanda also completed a Master’s of Science in Environmental Engineering in 2020, and a Master of Public Health in 2023 from Virginia Tech. There, her primary dissertation work focused on advancing applications of wastewater-based surveillance to inform pathogen and antimicrobial resistance circulation in rural communities, dissertation title: “Advancing Rural Public Health: From Drinking Water Quality and Health Outcome Meta-analyses to Wastewater-based Pathogen Monitoring”. Prior to Virginia Tech, she attended the University of Illinois at Urbana-Champaign, graduating with a Bachelor’s degree in Civil & Environmental Engineering. In her free time, Amanda enjoys running and exploring new cities. Before entering the Healy lab, she was an ORISE research fellow in the Water Reuse program at the U.S. Environmental Protection Agency (EPA) in Washington, D.C. where she worked on advancing adoption of water reuse across the water sector.
Postdoctoral Scholar
David Lee, MD
David is a hematology/oncology fellow in the Dana-Farber Cancer Institute/Mass General Brigham fellowship program. He is originally from Los Angeles, CA, and completed his undergraduate studies at the University of California-Berkeley, where he majored in Public Health. He then pursued his medical/graduate studies in Boston, receiving his MD at Harvard Medical School, MPH from the Harvard T.H. Chan School of Public Health, and MMSc in Global Health Delivery at Harvard Medical School. He completed his residency in Internal Medicine at Massachusetts General Hospital in the Global Medicine and Next-Generation Physician-Scientist Pathway programs. As a current hematology/oncology fellow at DFCI/MGB with a background in global public health, he is applying laboratory-based and bioinformatics approaches in environmental surveillance to advance population-based cancer prevention strategies.
Doctoral Student
Anna Impellitteri
Anna Impellitteri is a Population Health Sciences PhD student in the Department of Environmental Health at the Harvard T.H. Chan School of Public Health. Anna is from Hebron, Kentucky and received her B.S. in Environmental Science from Centre College. She received her MPH in Global Environmental Health from the Emory University Rollins School of Public Health, completing certificates in Water Sanitation and Hygiene (WASH) and Data Science.
During her time at Emory and in the Atlanta metro area, Anna worked in academic and non-profit laboratories developing digital PCR methods for applications in wastewater and distribution systems. She also contracted with the Waterborne Disease Prevention Branch in the Centers for Disease Control and Prevention, performing qualitative and quantitative data analysis to support and evaluate community-sensitive global WASH solutions. Her research interests include wastewater disease monitoring, reproducible data workflows, and water infrastructure in resource-limited settings. Outside of the lab, you can find Anna making homemade pasta, traveling, or rollerblading.
Masters Student
Sitara Sastry
Sitara Sastry is a Master of Science student concentrating in Environmental Health Exposures in the Department of Environmental Health at the Harvard T.H. Chan School of Public Health. Sitara is from Fairfax, Virginia and received her B.S. in Environmental Engineering with a minor in Global Health from Cornell University. At Cornell, Sitara focused her coursework and research on wastewater treatment and management. She also worked with local partners to promote sustainable practices in Ithaca as President of Engineers for a Sustainable World. In her free time, Sitara loves to dance and play with her dog.
Masters Student
Liz Druschel
Liz Druschel is a master’s student in the Department of Environmental Health at the Harvard T.H. Chan School of Public Health. Liz is from Beaver, Pennsylvania, and earned her B.S. in Biology from the Pennsylvania State University. Before coming to Harvard, she taught high school biology in Eastern, Kentucky as a member of Teach for America Appalachia and a Mountain Teacher Fellow. Her research interests include wastewater surveillance, water infrastructure in low-resource settings, and a just transition for Appalachian communities. Liz volunteers with young people and continues to tutor science and math. In her free time, she enjoys hiking, bird-watching, and exploring Boston.
Masters Student
Sen Wang
LSen Wang is a student intern in the Department of Environmental Health at the Harvard T.H. Chan School of Public Health. He is a master's student in Environmental Engineering at the College of Environmental Science and Engineering, Tongji University in Shanghai, China. He received his B.S. in Environmental Engineering from Sun Yat-sen University. Sen’s research interests focus on wastewater treatment and surveillance in treatment plants, as well as microbial analysis in urban aquatic environments. In his free time, Sen enjoys hiking, exploring cities, and discovering new foods.