David A. Stahl is a Professor in Civil and Environmental Engineering and an Adjunct Professor in Microbiology at the University of Washington. He is well known for his research on the physiological ecology of microorganisms sustaining critical nutrient cycles (N, C, S) in natural and engineered systems. He is the co-founding editor of the journal Environmental Microbiology and is one of the authors of the well-known textbook Brock Biology of Microorganisms. He is a member of the American Academy of Microbiology, the DOE Biological and Environmental Research Advisory Committee and served as the Chief Scientist for the Environmental Molecular Sciences Laboratory, at the Pacific Northwest National Laboratory. In 2012, he was elected to the National Academy of Engineering.