The Cornerstone Team
Everyone on staff at Cornerstone Healing Center is living a life free from active addiction. We’ve helped hundreds of people find long-term, meaningful sobriety — and we can help you, too. But you have to take the next step.
Estil Wallace
Founder/CEO
Estil Wallace has worked in the recovery field for 12 years. He has served 5A.org as the organization’s’ Executive Director, Board Member and President. Estil has also worked directly with alcoholics and drug addicts inside of the Maricopa County jail system including Tent City, Lower buckeye, Durango and Towers Jail. Additionally, Estil has over 14 years of experience with inside/outside sales, management, networking and digital marketing. He believes that anyone can heal that has the willingness to change.
Marcus Clark
Executive Director
Marcus Clark 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, as well as three different mental health disorder programs for Community Bridges and Empact SPC.
Dr Stacey Smith PhD
Cheif Clinical Officer
Dr. Stacey Smith is a licensed psychologist in both Arizona and Texas and has been working in the addictions field in residential and IOP settings since 2010. He has a wide variety of experience in the addiction field, including work 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, examination of how the brain works and how technology can play a key role in client recovery has been a focus of his work.
Karen Williams
Clinical Lead
Karen Williams is a Licensed 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.
Dr Stephen Locnikar DO
Medical Director
Steven J Locnikar, DO has over 10 years experience in addiction medicine and is a Board Certified Facial Plastic and Reconstructive Surgeon. He is renowned for providing cutting edge detoxification from all substances of abuse or dependence. He has deep understanding of the detoxification process (both professional and personal) and finds the least painful and safest manner to detox his patients in a compassionate environment. He also provides advanced techniques and support for relapse prevention.
Dr. Rebecca Knowles
Occupational Therpist
Dr. Rebecca Knowels specializes in mental health, sensory processing, and substance use treatment, at Cornerstone Healing Center, in Scottsdale, AZ. She completed her doctorate from A. T. Still University in Mesa, AZ. Rebecca has nearly 10 years of experience as a yoga teacher, including therapeutic applications for the treatment of chronic pain.
Lionel Estrada
Counselor
Lionel Estrada has been working to help those struggling with substance abuse for over three years starting at Crossroads for men, Community Bridges, and Community Medical Services before landing his dream job as a therapist at Cornerstone. While staying true to his own recovery program, Lionel is currently working on his Masters in Addiction Counseling.
Celia Cacciotti
Human Resources
Originally from Toronto, Canada, Celia Cacciotti moved to the Scottsdale area in 1994 with her family to escape the cold weather. Celia has been working in the medical field for the past 8 years. Celia’s health philosophy is “Balance is key to feeling better and living better – We should honor and tend to our mental, physical and emotional/spiritual well being.” When she isn’t helping clients or being the glue that helps keep Cornerstone together, she enjoys spending time with family and friends, cooking, visiting local farmer’s markets, and traveling.
Scott Brunst
Director of business Development
Scott Brunst specializes in program development/management. He and his team built Community Bridges Inc’s The Chronic Recitivator Navigator Program, The Community Comprehensive Health Program, City of Phoenix Homeless Outreach Program, and the company’s flagship Patient-Centered Health Home (Integrated Outpatient Practice). Scott has also worked hand in hand with Police Departments in the East Valley and presents on the subjects of substance abuse and stages of addiction.
Sead Hasic
Business Development Representative
Sead Hasic began his recovery journey in August of 2014. Shortly after, he started his career in the recovery field. Sead became a resident manager at a non-profit organization in the valley that helps hundreds of men and women, daily. Sead then took his experience to Calvary Healing Center where he continued his mission of helping others.
Max Perez
Behavioral Health Technician
Max Perez has worked in the behavioral health/recovery field for 4 years and has worked with a community-based outreach team to provide services to clients who suffered from addiction as well as being chronically homeless. Max has a passion for helping those suffering from drug and alcoholic addiction and believes everyone deserves to live a life free from addiction.
Nate MacKamie
Behavioral Health Technician
Nate McKamie found recovery in April of 2016. After a career in the restaurant business, he found his life’s purpose in helping people find sobriety and has been working in direct client care since Cornerstone’s inception.
DJ Cruse
Navigator
DJ Cruse has worked in the behavioral health/recovery field for 2 years and has worked with a community-based outreach team to provide services to clients who suffered from addiction as well as being chronically homeless. DJ has a passion for helping those suffering from drug and alcoholic addiction and believes everyone deserves to live a life free from addiction.
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