Dr. Ralph is a clinical psychologist, formerly at the Juvenile Justice Center in San Francisco, and Coordinator of the Juvenile Sexual Responsibility Program. Dr. Ralph is a psychiatric epidemiologist and neuropsychologist who has over 50 publications, including articles, book chapters, blogs, and books.

He was formerly Associate Clinical Professor in Family Practice, University of California School of Medicine at Davis, and Lecturer and Research Biostatistician in the Program in Maternal and Child Health, School of Public Health, at the University of California, Berkeley. He is a Trainer for Aggression Replacement Training through the California Institute for Mental Health. He completed the Transformative Leadership Vanguard Program through the University of Cincinnati Corrections Institute in 2025.

He is a board member of CalATSA and was formerly on the Prevention Committee of  ATSA. He is on the Conference Committee of the Forensic Mental Health Association of California. He is the juvenile treatment representative on the California Sex Offender Management Board and contributed, along with other board members, to their 2022 Youth Guidelines.