Hanna Wallach is a researcher at Microsoft Research in New York City and an assistant professor at the University of Massachusetts Amherst's School of Computer Science, where she is one of five core faculty members involved in UMass's newly formed computational social science research initiative. Hanna develops new machine learning methods for analyzing the structure, content, and dynamics of complex social processes. Her research contributes to machine learning, Bayesian statistics, and, in collaboration with social scientists, to the nascent field of computational social science. She has co-organized several workshops on Bayesian latent variable modeling and computational social science. Hanna also works to promote and support women in computing. She co-founded the annual Women in Machine Learning Workshop, now in its eighth year. Hanna holds a B.A. in Computer Science from the University of Cambridge, an M.S. in Cognitive Science from the University of Edinburgh, and a Ph.D. in Physics from the University of Cambridge. In her not-so-spare time, Hanna (or Logistic Aggression, as she is better known) likes to put on roller skates and hit people really, really hard.