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Gregory "Mark" Anderson

Gregory "Mark" Anderson is Deputy Chief of the Grand Canyon Monitoring and Research Center (GCMRC) in Flagstaff, Arizona. In support of the Grand Canyon Protection Act of 1992, the GCMRC measures and analyzes the effects of Glen Canyon Dam operations on the Colorado River, conducts research on Lake Powell, and works to understand river ecosystems in the southwest U.S.

Mark has worked in the Colorado River ecosystem focused on aquatic resources since 1998. He has worked for the USGS since 2023, having previously been with the National Park Service. Mark’s experience is extensive in the areas of aquatic resource management, aquatic invasive species, integrated pest management, public health beach monitoring, laboratory development and management, limnology, aquatic entomology, hydrocarbon contamination, and reservoir sedimentation.