Dr. Hemmelstein received his B.A. degree and elementary school teaching credential from Sonoma State University in California. He earned his M.S. and Ph.D. degrees in school psychology at The Penn State University. Dr. Hemmelstein worked as a staff psychologist at a residential treatment facility in Erie, Pennsylvania. His duties included providing inpatient and outpatient psychotherapy, staff training, and consultation, as well as oversight of the day-to-day operation of three Emotional Support classrooms.
Between his undergraduate and graduate education, he co-founded a private elementary school (K-6) in Los Angeles, where he taught kindergarten for three years, and later taught as a clinical teacher of adolescents for two years at a private psychiatric hospital in central Pennsylvania. Dr. Hemmelstein currently lives in Lemont, Pennsylvania, where he works as a school psychologist in the State College Area School District.