Rob Cantrell & Sheryl Johnson discuss substance abuse programs that work. No two addictions are the same... why use only one source for recovery. Rob Cantrell is a Master level Certified Addiction Professional, Certified Interventionist and public speaker who works within the LGBTQ community. Sheryl Johnson is a Licensed Mental Health Counselor, Master level Certified Addiction Professional, Substance Abuse Professional and Master Addiction Counselor who focuses on mainstream America. Together, Rob & Sheryl bring a combined 25 years of professional experience to anyone battling a substance use disorder.