Marvin Glotfelty is principal hydrogeologist and co-founder of the groundwater consulting firm Clear Creek Associates. He received his BS and MS degrees in geology from Northern Arizona University and is a Registered Professional Geologist in Arizona and California, and a Licensed Water Well Driller in Arizona. During his professional career, which spans over thirty-five years, he has been involved in the design, installation, rehabilitation, and abandonment of over nine hundred water wells in the southwestern United States. 

Marvin has authored over twenty publications dealing with all aspects of water well installation. He lectures widely throughout the United States and in other countries on water well design, siting, and rehabilitation, and was selected as NGWA’s Distinguished McEllhiney Lecturer for 2012. He has served as the technical director of the Arizona Water Well Association since 1990.