Joseph Tien is a professor in Mathematics with a courtesy appointment in Epidemiology. His research is on infectious disease modeling, particularly regarding disease dynamics on networks of various kinds. Some examples of his research include study of cholera dynamics in Haiti, disease dynamics on communities connected by mobility networks, and syphilis dynamics among men who have sex with men in Columbus. He is also interested in the spread of information on social networks, for example in connection with vaccination and other behaviors relevant to disease spread. Dr. Tien is affiliated with the Mathematical Biosciences Institute and the Infectious Diseases Institute, where he is co-thematic lead in the area of Disease Ecology, Epidemiology, and Population Health. He is also involved with endeavors using data science, network theory, and mathematics for social change. Dr. Tien is co-founder and director for the Center for the Study of Networks and Society (formerly Susan Bourbaki Anthony), a non-profit dedicated to using data-driven methods for promoting informed civic engagement. Our work has appeared in the Atlantic, Huffington Post, and Mother Jones.