Her major fields of research are public administration and organization theory, health policy and environmental health policy. In all of her research, Keller pursues questions regarding the role of expertise in public decision making. Keller holds a PhD in political science from the University of California, Berkeley. Before coming to Berkeley, Keller was a member of the Political Science faculty at the University of Colorado, Boulder and completed a postdoctoral fellowship with the Robert Wood Johnson Scholars in Health Policy Research Program.