In 2011, Hahn joined the faculty of the Perelman School of Medicine at the University of Pennsylvania along with her husband and research partner George Shaw.[3][4] Hahn and Shaw also work with CHAVI, a multi-institutional consortium.[5] Hahn is the lead researcher of CHAVI's Viral Biology Team.[8] In addition to her work in universities and as a researcher, Hahn is also a member of the American Academy of Arts and Sciences, the American Academy of Microbiology, the National Academy of Medicine, and the National Academy of Sciences. She is also a member of the advisory board of the Bill and Melinda Gates Foundation's HIV/AIDS Program and has served on numerous NIH Counsel groups.[9]