Mark Williams is a professor of Geography and a Fellow at the Institute of Arctic and Alpine Research at the University of Colorado, Boulder. He is a Fellow of the American Geophysical Union and is currently a Senior Fulbright Scholar in Nepal. Williams is the lead or co-lead on several large research projects evaluating how perturbations may change the hydrology of watersheds, including an NSF-funded project focused on evaluating potential impacts of unconventional oil and gas extraction on water and air quality, mountain hydrology and climate change in the U.S., and disappearing Himalayan glaciers and watershed hydrology.