Erin Miller is an Assistant Research Scientist at the University of Maryland, and Principal Investigator for the Global Terrorism Database (GTD) and related research projects. Miller earned a BA in Sociology from the University of Pennsylvania, and an MA and PhD in Criminology and Criminal Justice from the University of Maryland. She has been part of the GTD team since 2004, and her roles have included improving the consistency of the data and adding key variables to the database, developing efficient and effective data collection strategies, workflows, and training, and producing accessible analysis that provides context for current events in terrorism and counter-terrorism. She frequently consults with users of the database, including researchers, policy makers, analysts, journalists, and students. Her research investigates patterns of decline among terrorist organizations and movements worldwide, using innovative statistical analysis of data from the GTD. She has taught statistics courses at the University of Maryland and delivered invited lectures on the GTD and the implications of research methodology for terrorism research.