Joshua Weitz is a professor in the School of Biological Sciences at the Georgia Institute of Technology, where he holds the Tom and Marie Patton Chair in Biological Sciences. He joined Georgia Tech in January 2007 and advanced through the ranks to full professor. Weitz also maintains adjunct appointments in the School of Physics and courtesy appointment in the School of Electrical and Computer Engineering. He serves as co-director of the Interdisciplinary Ph.D. program in Quantitative Biosciences (QBioS), which he helped found to train students at the interface of physical, mathematical, computational, and biological sciences. Additionally, he holds the Blaise Pascal International Chair of Excellence at the École Normale Supérieure in Paris. Weitz earned an A.B. in Physics from Princeton University in 1997 and a Ph.D. in Physics from the Massachusetts Institute of Technology in 2003. Following his doctorate, he was an NSF Postdoctoral Fellow and Associate Research Scholar at Princeton University from 2003 to 2006, working on ecology and evolutionary biology with Simon Levin.

Weitz's research examines the structure and dynamics of complex biological systems, with a focus on how viruses influence human health and planetary ecosystems. His group investigates viral dynamics across molecular, population, and evolutionary scales; theoretical ecology and evolutionary biology; and disease dynamics and epidemiology. Employing nonlinear dynamics, stochastic processes, and large-scale data analysis, key projects include viral-host infection networks, phage therapy for bacterial infections, marine viral ecology, and COVID-19 modeling tools such as the Event Risk Assessment Planning Dashboard, which reached over 16 million users. Weitz has authored over 140 peer-reviewed publications, including highly cited works like 'Repeatability and contingency in the evolution of a key innovation in phage lambda' (Science, 2012), 'Synergy between the Host Immune System and Bacteriophage Is Essential for Successful Phage Therapy against an Acute Respiratory Pathogen' (Cell Host & Microbe, 2017), and his monograph Quantitative Viral Ecology: Dynamics of Viruses and Their Microbial Hosts (Princeton University Press, 2015), which received the Royal Society of Biology Postgraduate Textbook Prize in 2016. His contributions have earned him election as a Fellow of the American Association for the Advancement of Science for viral ecology, Simons Foundation Investigator awards in Theoretical Physics in Life Sciences and Ocean Processes and Ecology, Blaise Pascal Chair, and Georgia Tech Faculty of the Year by the Graduate Student Government Association.

Professional Email: jsweitz@gatech.edu