John Herdman, Ph. D., LADC is a licensed psychologist, and a licensed alcohol and drug abuse counselor. He has over 44 years of school, military, counseling, and consulting experience. He is the owner of Parallels and its Clinical Director. Dr. Herdman uses his years of experience to help client make positive changes in their life. As a specialist in addictions (substance and process) he uses cognitive behavioral therapy (CBT) as an evidence based therapy practice to help client change negative emotions (anger, anxiety, depression) and negative behaviors.

In 2018 Dr. Herdman published his fourth book called A Rational Workbook for Change. Early in 2018 he will publish the Seventh Edition of his seminal book Global Criteria: The 12 Core Functions of the Substance Abuse Counselor.