About us

The Cornerstone Mission

Cornerstone was founded in 2017 in Scottsdale, Arizona by Estil Wallace. After changing his life through recovery, Estil felt a great calling to bring healing and transformation to those struggling with addiction as he did. Estil understood the formula to a successful long-term recovery. A team was assembled and has since grown exponentially from its humble beginnings. 

We emphasize: 

  • Human connection
  • The development of character and integrity
  • The willingness to change and therefore heal
  • Embracing accountability 
  • Learning to take the hard way 
  • Giving back 

Meet the cornerstone scottsdale team

Cornerstone Healing Center has established its place as a leading addiction treatment center in Scottsdale, Arizona. We offer Partial Hospitalization, Outpatient and Intensive Outpatient Programs, as well as optional sober housing and ongoing critical support. Our clients remain with us as long as necessary for their success. We offer thorough evaluations to match each client with the right treatment plan, setting them up for the best possible outcome.

Reach out and get compassionate help for addiction.

The Cornerstone pHILOSOPHY

Cornerstone’s philosophy is simple. Addiction thrives in isolation, and the antidote to isolation is true and real human connection. Our Scottsdale rehab facilities are where true healing, connection, and transformation can occur. It’s where those who were once broken by addiction can become alive again. 

We believe in helping people broken by addiction to heal mind, body and spirit. By overlapping science with spirituality, we create an environment where a seemingly miraculous healing event sufficient to bring about recovery can and does happen rapidly. 

We know the way out of addiction

Call 24/7 for a free and confidential assessment.

Our Clinical Team

Dr. Stacey Smith PhD

Chief Clinical Officer

Stacey is a licensed psychologist in Arizona and Texas and has worked in the addiction field in residential and IOP settings since 2010. He has a wide variety of experience in addiction, including working with individuals who suffer from addictions to alcohol, drugs, intimacy/relationships, sex, and gaming addictions. Early in his career, Dr. Smith trained in EMDR techniques, knowing the important role that trauma work plays in the recovery process. Most recently, an examination of how the brain works and how technology can play a key role in client recovery has been a focus of his work.

Clinical Director

Karen is a Licensed Professional Counselor specializing in Addiction Recovery, EMDR, and Family Systems Theory at Cornerstone Healing Center in Scottsdale, AZ.  She holds a Master’s Degree in Professional Counseling from Grand Canyon University and has nearly 15 years of experience in substance use recovery and the behavioral sciences.  



Estil has worked in the recovery field for 12 years. He has served as the organization’s Executive Director, Board Member, and President. Estil has also worked directly with alcoholics and drug addicts inside the Maricopa County jail system, including Tent City, Lower buckeye, Durango, and Towers Jail. Estil has over 14 years of experience with inside/outside sales, management, networking, and digital marketing. He believes that anyone who can heal must have the willingness to change.

Marcus Clark

Executive Director/COO

Marcus has worked in the Mental Health / Substance Abuse field for over 5 years. Marcus specializes in developing and managing substance abuse and mental health programs. He has worked with Phoenix Fire and Police Departments, developing processes for training, managing, community involvement, and coordination between various mental health organizations. He has also worked with Pinnacle Peak Recovery, Scottsdale Providence Recovery Center, and three mental health disorder programs for Community Bridges and Empact SPC.

cornerstonE in the community

Vice News

Interview: Estil Wallace

Our founder Estil Wallace was invited to speak on how the COVID-19 pandemic has impacted those struggling with addiction.

Escaping Rock Bottom

Interview: Estil Wallace

Estil Wallace on Escaping Rock Bottom with Brandon Lee, discussing his journey from addiction to recovery and then to founding Cornerstone. 

Get Started Now

Call and speak with one of our caring team members about help for you or a loved one.

Most Major Insurances Accepted