Mark holds a Bachelor of Science from Kent State University, a Master in Education from Vanderbuilt University, and two Master of Science degrees in Environmental and Natural Resource Science and Land Use Planning from the University of Nevada, Reno.  Since 1987, Mr. Demuth has directed numerous environmental compliance/NEPA projects throughout the western US. He teaches as an adjunct faculty at UNR Enviornmental Policy and Law.  Mark supports GBI NEPA project coordination across Region 5 of the US Forest Service.

John Umek, PhD., University of Nevada, Reno (2015) supports GBI water resources program and is Assistant Research Professor with the Desert Research Institute and has 18 years of experience in aquatic ecology, water quality monitoring, and natural resource management. He is experienced with a range of statistical methods, numerical modeling, and working with invasive and endangered aquatic organisms. He has extensive field surveying and water quality monitoring experience. Current and former projects include working on an interdisciplinary NSF project focused on springs biota structure and condition across the Southern Great Basin, impacts to springs overtime in the Eastern Great Basin and Lahontan Cutthroat trout movement in Central Nevada.

Sean Simpson, MA, University of Nevada, Reno, Reno (2010) is the Institute’s Senior Consulting Archeologist and has expertise in NEPA compliance inventories for mining, gas, oil and communication infrastructure on Bureau of Land Management and Forest Service public lands across Nevada, Washington and Oregon. Mr. Simpson has performed archaeological inventories and architectural assessments of irrigation and bridge features for the Army Corps of Engineers and has expertise and extensive experience in completing district evaluations of historic mining districts in central and northern Nevada, including Manhattan, Kinsley, Rochester, Yerington, Pine Grove, Rockland, Fairview, and Bell Mountain mining districts.