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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.

Dr. Jennifer Montague
Senior Medical Director

Dr. Montague is the senior medical director for our inpatient and outpatient levels of care. Trained in both Addiction Medicine and Internal Medicine, she embodies an integrative...

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Savanna Klippel, APRN, FNP-BC
Family Nurse Practitioner

Savanna Klippel currently serves as the Family Nurse Practitioner at Colorado Springs Detox Center & Cascade Canyon Teen Residential. In 2012...

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

Sherry is our team’s Psychiatric Nurse Practitioner, with 32 years experience in healthcare. She works collaboratively with the clients to diagnose, treat, and...

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Brannon Pruet, PhD-c, LPC, CAC II
Program Director

Brannon is a Licensed Professional Counselor and Level Two Certified Addiction Counselor. Brannon has 20 years of clinical experience working...

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Sahar Givpour, MS, LPC-R, CSAC, ADS
Program Director, Reston

Sahar currently serves as the program director for the Reston, Virginia office.

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Sarah Fletcher, LPC, LAC
Chief Clinical Officer

Sarah Fletcher serves as the Chief Clinical Officer at Sandstone Care, overseeing all clinical services for the organization. Sarah holds...

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Annabella Cordova-Barnes, MA, LPC
Program Director

Annabella is a primary therapist for Sandstone Care's Denver and Broomfield locations. She received her Master's in Counseling...

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Angie Marks, LPC, LAC
Primary Therapist

Angie is a Licensed Professional Counselor currently serving as the primary therapist at our Denver facility. For the last 18 years, she has been employed...

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Peter King, LCPC
Program Director

Peter is a Licensed Clinical Professional Counselor in the state of Maryland and earned his Master of Arts degree in Clinical Mental Health Counseling from...

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Erika Alhashmi, LPC
Assessment, Intake, and UR Coordinator

Erika is a Licensed Professional Counselor with over nine years working in the mental health field, six primarily with alcohol and substance abuse. She earned ...

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Stevie Williamson, MA, LPCC
Primary Therapist

Stevie graduated with a bachelors of Science in Human Development and Family Studies with a concentration in Pre-Health from...

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Dani Denver, MA, LPC, LAC
Primary Therapist

Dani is a Licensed Professional Counselor and Licensed Addiction Counselor. She completed her Master of Arts in Clinical Mental Health Counseling from...

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Kaley Chiles, LPC, LAC
Family Therapist

Kaley began her career doing play therapy with young children. She struggled with what she saw as the limited capacity children had to utilize treatment...

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Samantha Miller, LPC
Primary Therapist

Sami works as the adolescent primary therapist at Sandstone Care's Boulder location. She has worked with the organization...

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Michelle Pelle, MSW, LCSW, LAC
Primary Family Therapist

Michelle is a Licensed Clinical Social Worker and Licensed Addiction Counselor. She completed her Masters in Social Work with a concentration in Family Systems at the University of Denver. Prior to becoming...

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William "Liam" Grafton III
Information Systems Administrator & Data Specialist

Liam currently serves as the Information Systems Administrator & Data Specialist across all of Sandstone Care's locations.

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Ashley Whiting
Discharge Planner

Ashley currently serves as the Discharge Planner for Colorado Springs Detox & Residential Center as well as Cascade Canyon Teen Residential Center. As...

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Priscilla Gonzalez, MA
Lead Admissions Coordinator

Priscilla currently serves as Lead Admissions Coordinator for Sandstone Care. She has been with the us since 2018, providing consistent support to families...

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Ben Sigley
Director of Housing

Ben Sigley currently serves as the Director of Housing Programs at Sandstone Care. Ben began his recovery journey in 2013, graduating from The Stout Street Foundation, where he facilitated...

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Caleb Krull, CAC I
Compliance Manager

Caleb Krull is a Compliance Manager who has been working professionally in substance abuse since February 2016, although he does have personal...

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Todd Wilfawn
Residential Manager

Todd is the house manager for our men's recovery living house in Denver, called Rally Point. Prior to Sandstone, Todd worked in...

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Travis Howieson, CAC-I
Lead Behavioral Health Technician

Travis began his work in addiction treatment working as a Behavioral Health Technician at the Raleigh House of Hope in Arvada, CO. After a year...

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Rowan Hill
Empowerment Director

Rowan is the Empowerment Director at Sandstone Care, which is our spin on HR. Rowan has a BA in Geology from Colorado College. He first became interested...

Phone Number: 720-526-0480
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Drew Powers, CAI-II, CSAC-A
Chief Growth Officer

A native of Northern Virginia, Drew has worked in the substance use disorder & mental health treatment field for over a decade. Drew started his career in direct care...

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Jess Barry
Director of Business Development, Aftercare & Alumni Services

Jess oversees business development, aftercare and discharge planning and alumni services in Colorado. Prior to joining Sandstone Care, Jess worked...

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Emily Grotheim
Recruiter

Emily is a Colorado native that has recently come home after spending the last 10 years in Minneapolis and Milwaukee.

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Walter Baker
Insurance Advocate Lead, Denver

Walter is our Insurance Advocate Lead and works in our Denver office.

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Luke Mattey
Accounting & Finance Manager

Luke is the Community Outreach Associate for Sandstone Care in the DC Metro area. Born and raised in southern Ohio, Luke received his BS in Family...

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James Devenport
Insurance Adovcate

James currently serves as a healthcare billing & coding specialist across all our locations.

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Katie Pine
Senior Insurance Advocate, All Locations

Katie currently serves as a senior insurance advocate for all of our locations. She comes to us with four years of experience as a medical insurance biller and account manager.

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Amanda Porter, LPC, LAC
Program Director

Amanda Porter is the Program Director at Sandstone Care’s Adolescent Residential Program at Cascade Canyon. She has over 8 years of clinical mental health and...

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Louis Hrabar, NCRC-II, NCIP
Admissions Assistant Manager

Louis has worked in the mental health and addiction field since 2010, and is proud to serve as an Admissions Coordinator at Sandstone Care. His dedication...

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Marina Vidrine
Clinical Outreach Ambassador

Marina currently serves as the Colorado clinical outreach ambassador. Prior to joining Sandstone Care, Marina worked for 3 years as the clinical coordinator...

Phone Number: (720) 773-4574
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Rebecca Rowell, BSN, RN
Nursing Supervisor

Rebecca earned her Bachelor of Science in Nursing from the University of New Mexico in 2016. She started out in Arizona working as a nurse...

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Smitty Jost
Executive Assistant

Smitty currently serves as an executive assistant and comes to us with over 30 years of varied administrative experiences, most of which took place in the mental health field.

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Matthew File
Insurance Advocate Specialist

Matthew is an Insurance Advocate Specialist with Sandstone Care and is extremely excited for what his future in recovery holds.

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Jeff Hoffman
Academic & Vocational Advisor

Jeff is the Academic and Vocational Coordinator at Sandstone Care’s Denver location. Before working at Sandstone, Jeff has worked as a GIS analyst, academic...

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