Meet Our Addiction Treatment Staff


Charles Shuman, MD

Medical Director

(303) 955-5599

Sheila Ash
Janada Halbisen-Gibbs
Marty Rein, Ph.D, LPC, CACIII

Clinical Director

Karli Jo Lamb, MA, LPCC. CACII

Primary Therapist

Keith Colton, LCSW

Clinical Lead

Kathleen Voelsing, BCN


Stepheny Chapple, BA, MSCJ, NLC
Laura Whitcomb, MA, LPCC


Faith Brandt, LPC
Julia Miguel

Music Therapist

Andrew Tomey

Housing Coordinator

(877) 212-1238

Angelica Luiz

People Operations Manager

(303) 955-5599

Cortland Mathers-Suter, MSSA

Founder, COO

(303) 955-5599

Karen Rodriguez

Administrative Assistant

Steven Brier

Marketing Director

Pete Wahlers


Blake Johnson

Case Manager

Donna Segrin

Director of Admissions

(877) 736-9727

Erin Greney

Admissions Representative

Laura Beth Burkhalter

Alumni Coordinator

Ethan Castro, MBA, JD

Chief Executive Officer

(303) 955-5599

Liz Kane

Senior Outreach Manager

Connect with Our Addiction Treatment Staff Today

Ready to begin your recovery journey? Have questions for a member of our addiction treatment staff? Learn more about AspenRidge Recovery Fort Collins today! Whether you want to begin the admissions process or verify your insurance, it’s easy to contact AspenRidge Recovery Fort Collins. Call today at (866) 957-6941, we can’t wait to begin this journey with you!