NANCY B. GRIMM is an ecosystem ecologist who studies the interactions of climate change, human activities, resilience, and biogeochemical processes in urban and stream ecosystems. Grimm was founding director of the Central Arizona–Phoenix LTER, co-directed the Urban Resilience to Extremes Sustainability Research Network, and now co-directs the NATURA and ESSA networks, all focused on solving problems of the Anthropocene, especially in cities. With collaborators and students, her research centers on nature-based, technological, and governance solutions that can build resilience to a future with increased frequency and magnitude of extreme events. In streams, Grimm studies how hydrologic and climatic variability influence ecosystem processes such as stream metabolism and nutrient dynamics, and more recently, the impacts of a novel desert disturbance (wildfire) on stream processes through hydrologic connectivity of upland to stream-riparian corridor. Grimm was President of the Ecological Society of America and is a Fellow of the American Association for the Advancement of Science, the American Geophysical Union, the Ecological Society of America, the Society for Freshwater Science. She is a member of the National Academy of Sciences and has made >230 contributions to the scientific literature with colleagues and students.