Staff and Faculty Directory
Professor of Practice
Prior to joining the faculty at USD, Dr. Callahan was the senior director for integrated instructional support at the San Diego County Office of Education’s Juvenile Court and Community Schools. During his 18-year tenure at the San Diego County Office of Education, Dr. Callahan practiced as one of the first school psychologists in the Juvenile Court and Community Schools, where he was an architect of student assessment, counseling and guidance programs and also assisted in the development of the court and community schools first special education programs, including mental health services for students with disabilities. While at the San Diego County Office of Education, Dr. Callahan also led accreditation, evaluation, planning, research, data-systems, career-technical education, student support services, operations and provided direct support to Monarch School.
Dr. Callahan has researched, published and presented on topics related to assessment, evaluation, school psychology, data usage and best practices in California court, community, continuation and alternative schools. He was the principal investigator in the California Department of Education’s grant funded Best Practices in Educational Options Research and Demonstration Project from 2006 to 2009. He is also a past president of the California Educational Research Association, the state affiliate of the American Educational Research Association. He has consulted with the California Department of Education, WestEd, Job Corps and the Kern County Office of Education on projects related to alternative accountability systems, federal accountability systems and psychoeducational evaluation.
Dr. Callahan is a California Licensed Educational Psychologist and also practiced as a school psychologist in the Poway Unified School District in San Diego County from 1990 to 1998. While in Poway Unified, Dr. Callahan oversaw district mental health counseling programs, day treatment for students with disabilities and developed data analytic protocols for Curriculum-Based Measurement (CBM) and for examining racial differences in Grade Point Average (GPA).
Dr. Callahan holds a PhD in Clinical Psychology with an emphasis in experimental psychopathology from the University of California, San Diego and San Diego State University, where he was awarded a pre-doctoral minority fellowship from the US Department of Health and Human Services Substance Abuse and Mental Health Services Administration to research and provide clinical services to underserved populations. Dr. Callahan completed his doctoral internship at David Grant Medical Center at Travis Air Force Base; the University of California, Davis Neuroscience Center, and the Northern California Veterans Affairs Health Care System. Dr. Callahan also holds a Master of Science degree in counseling and a Bachelor’s degree in psychology from San Diego State University. Dr. Callahan holds current California Pupil-Personnel Credentials in School Psychology and School Counseling, as well as a Clear California Administrative Services Credential.
Dr. Callahan’s current research interests include school-based mental health service models for incarcerated youth, mental health needs in homeless parents of school-age children as potential barriers to stable housing and integrated student/family support service models in Catholic K-8 schools.