Introduction

For more than three decades, the 12 Core Functions have provided the backbone of professional alcohol and drug counseling. From screening to consultation, these functions define the what of a counselor’s work—the fundamental tasks we must perform competently to help clients recover.

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About Me

John Herdman, PhD

John Herdman, PhDis a psychologist with over 50 years of experience in education, the military, clinical counseling, and consulting. He specializes in solution-focused and cognitive-behavioral approaches, particularly in mental health and addictions. Dr. Herdman has taught at the University of Tampa, Doane University, and Loyola Marymount University. He is the CEO of HerdmanHealth and author of Global Criteria: The 12 Core Functions of the Substance Abuse Counselor—9th Edition.

John Herdman, PhD

John Herdman, PhD is a psychologist with over 50 years of experience in education, the military, clinical counseling, and consulting. He specializes in solution-focused and cognitive-behavioral approaches, particularly in mental health and addictions. Dr. Herdman has taught at the University of Tampa, Doane University, and Loyola Marymount University. He is the CEO of HerdmanHealth and author of Global Criteria: The 12 Core Functions of the Substance Abuse Counselor—9th Edition.