“Thank you so much for helping me see what has always been right in front of me and that’s a glimmer of hope. I feel like my life has turned for the better and couldn’t have done it without you.”

Don G.

Mental Heath Professionals


Malcolm Horn, Ph.D., LCSW, MAC, SAPDirector of Special Services

Dr. Horn received her Doctorate in Psychology, with a teaching emphasis, from Walden University and has over a decade of progressive clinical experience working with the complex diagnoses that often accompany addictions and co-occurring disorders. She is a Licensed Clinical Social Worker and is licensed by the state of Montana as an Addiction Counselor. She is certified as a SAP (Substance Abuse Professional) to conduct assessments for those with a safety-sensitive position under the Department of Transportation. She also had accreditation from the NAADAC (National Association of Alcohol and Drug Addiction Counselors) as a Masters level Addiction Counselor. She is responsible for ongoing training and education for clinical and support staff.

Ben Randolph, MSW, SWLC, MAC

Ben was raised in Billings and has a Bachelor’s of Science in Psychology and a Master’s of Social Work from the University of New England. He is an Addiction Counselor licensed by the State of Montana (LAC) and has accreditation from the National Association of Alcohol and Drug Addiction Counselors as a Masters level Addiction Counselor (MAC). Ben also is completing his licensure as a Clinical Social Worker (SWLC). He has worked at Rimrock since 2012 where he gained experience in all levels of care.

Ben believes in an integrated approach to health and wellness where the person is the creator of change. He employs a variety of therapies when working with individuals, couples, and families, including cognitive behavior therapy (CBT), mindfulness based therapy, motivational interviewing, interpersonal therapy to treat addiction and co-occurring disorders, and is a trained eye-movement desensitization and reprocessing (EMDR) therapist. His special interests include trauma, anxiety disorders, cultural-relational issues, and integrative modalities.

Carrie Reeves, MA, LCPC, LAC, CCTP

Carrie is a Licensed Addiction Counselor, Licensed Clinical Professional Counselor, and Certified Clinical Trauma Professional. She received her Master of Arts in Counseling from Colorado Christian University. Carrie integrates Person-Centered care with Cognitive Behavioral Therapy and other Psychotherapeutic practices. She originally gained a passion for therapy while serving as a Resident Advisor in her undergraduate program where she witnessed the impact of unaddressed trauma and mental health symptoms. Carrie loves to watch others grow through their healing process, be empowered to reach their goals, and free to see their personal value. In her free time, Carrie enjoys hiking with her two dogs and her husband, listening to live music, or staying home with a good book and hot cup of tea.

Liz Smith, MS, LCPC, LAC, CCTP

Liz earned her Master’s Degree in Clinical and Counseling Psychology from Capella University. Liz is a Licensed Clinical Professional Counselor (LCPC), Licensed Addiction Counselor (LAC), and a Certified Clinical, Trauma Professional (CCTP).

Liz began her career at Rimrock in 2014 as an intern and realized she loved the holistic approach utilized in addiction treatment. She is passionate about working with those struggling with codependency, personality disorders, mood and anxiety disorders. She specializes in working with members of the LGBTQ+ community, and is fluent in English and Spanish.

Liz believes individuals do the best they can with what they have. She is a client-centered therapist and creates a safe, non-judgmental environment with unconditional positive regard. She uses Gestalt Therapy techniques along with Dialectical Behavior Therapy (DBT) techniques to help the client explore ongoing emotions in the here and now.

Jessica Erickson, MS, LCPC, LAC

Jessica Erickson went to school at Montana State University-Billings where she studied and received her Master of Science Degree in Clinical Rehabilitation and Mental Health Counseling. Jessica holds accreditation from the National Prevention Research Institute as an instructor for the ACT/PFL (Assessment Class Treatment/Prime for Life) Program. She is dually licensed in the state as a Licensed Clinical Professional Counselor (LCPC) and Licensed Addiction Counselor (LAC). She has extensive clinical experience working with adults with addictions and co-occurring disorders. She is responsible for Individual Mental Health Counseling, Co-Occurring Treatment Court Clients, Telehealth services, as well as teaching the ACT/Prime for Life classes. Jessica was born in Seattle, Washington, she also lived in Houston, Texas, before moving to Montana her freshman year of High School. She enjoys painting, sewing, and spending time with her family. She has been serving clients at Rimrock Foundation since 2015 and says

“I appreciate the opportunity I am granted each day to help clients reach their goals and meet their potential”.