Barney began his clinical career at Gateway Rehabilitation Center in 1992. He also worked for the Center for Chemical Dependency Treatment at St. Francis and was the director of admissions for Greenbriar Treatment Center. In 1997, he opened a private practice which grew through the years, providing substance abuse, mental health and sex offender treatment for United States Probation/Pre-Trial Service. This successful practice continued to expand and became AAR in 2011. Barney has also provided drug and alcohol treatment to the forensic population in a maximum security prison for nearly two decades.