John W. Herdman

About the Author

John W. Herdman is a distinguished educator and author renowned for his contributions to the field of substance abuse counseling. With decades of experience in clinical practice and academic instruction, he has dedicated his career to equipping professionals with the essential skills needed to support individuals battling addiction. His seminal work, Global Criteria: The 12 Core Functions of the Substance Abuse Counselor (Sixth Edition), serves as a cornerstone resource for counselors worldwide, offering comprehensive guidance on ethical practices, assessment techniques, and intervention strategies. Herdman's approach emphasizes evidence-based methods and compassionate care, reflecting his commitment to advancing the standards of addiction treatment and recovery support.