Mr. Caldwell is a hydrologist and soil scientist specializing in field investigations and numerical modeling associated with near-surface vadose zone hydrology, landscape restoration, and soil evolution. He is currently enrolled at the University of Nevada, Reno seeking his Ph. D. in the Hydrologic Sciences Program while continuing his professional career at the Desert Research Institute. His current research focuses on the ecohydrology and restoration of arid lands, the characterization and scaling of soils and hydraulic parameters, and soil moisture monitoring and data acquisition. He is also the Soil Characterization Laboratory supervisor and oversees its management.