He currently teaches Sedimentation and Stratigraphy, Structural Geology, Plate Tectonics, Geophysics, Geologic Evolution of North America and Geology Field Methods at ETSU. He received a B.S. in Geology from Monash University, Australia in 1983 and a Ph.D. from the University of Florida in 1990. His dissertation research employed magnetic polarity stratigraphy methods to date Pliocene and Pleistocene vertebrate fossil sites in southeastern Australia. His research interests at Gray are focused on characterizing the geology of the site and this includes determining its size, subsurface structure, stratigraphy and fill history.