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Meet Our Team

Our Team



We’ve assembled a highly-credentialed team of doctors, therapists, and specialists. They have collectively worked with thousands of clients throughout their careers in helping adolescents and young adults struggling with drug and alcohol abuse and/or mental health issues like depression, and anxiety.

We firmly believe a highly experienced, dedicated team with a passion for working with teens and young adults is the single most important piece of a program. Our team is fully committed to our mission of relentlessly pursuing successful clinical outcomes.

Our Leadership Team

Dianna Sandoval, LPC, LAC
Executive Clinical Director

Dianna has over 20 years of clinical experience working with adolescents and young adults, and has a Masters of Arts in Psychology from Regis University. 

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Dr. Nathan Moore, MD
Medical Director, Colorado Springs & Cascade Canyon

Dr. Nathan Moore is Board-certified by the American Board of Family Medicine. Dr. Moore attended attended Duke University School of Medicine and obtained his M.D. in 1995.

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Dr. Donna Nikander, DNP, PMHNP-BC, FNP-BC
Medical/Psychiatric Nurse Practitioner, Colorado

Dr. Donna Nikander is Sandstone Care's Psychiatric Nurse Practitioner supporting our entire continuum of care in Colorado.

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Sherry McAtee, MHA, MS, BSN, RN, CRNP-PMH, PMHNP-BC, FACCP, MAJ (RET) USAF
Psychiatric Nurse Practitioner, North Bethesda

Sherry is our team’s Psychiatric Nurse Practitioner, with 32 years experience in healthcare.

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Sarah Fletcher, LPC, CAC II
Program Director, Boulder

Sarah earned her Masters degree in Rehabilitation Counseling with a specialization in substance use disorder from Southern Illinois University in Carbondale.

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Brannon Pruet, LPC, CAC II
Program Director, Denver

Brannon is a Licensed Professional Counselor and Certified Addiction Counselor II.

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Kevin Barwick, LCPC-S
Program Director, North Bethesda

He has graduate and post-graduate degrees and training in Mental Health from the University of Maryland and Bowie State University.

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Casey Cherry, LPC, LAC
Program Director, Cascade Canyon Teen Residential

Casey is a Licensed Professional Counselor and Licensed Addiction Counselor.

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Savanna Klippel, APRN, FNP-BC
Family Nurse Practitioner, Colorado Springs Detox Center & Cascade Canyon Teen Residential

Savanna currently serves as the Family Nurse Practitioner for Colorado Springs Detox Center & Cascade Canyon Teen Residential. 

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You’ll be Seen, Valued, Heard & Respected

We inspire change by meeting you where you're at. We want to come alongside to support and help you start living the life you want to live.

Professional Events

We regularly host a variety of events at Sandstone Care. Most events are ideal for health professionals looking for fresh perspectives, educational presentations, and training. Each educational presentation offers CEUs and CPDs.

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