Meet the Windmill Wellness Ranch Staff ...
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26229 N. Cranes Mill Rd, Canyon Lake, TX 78133 · A different kind of treatment center · Admissions Available 24/7
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Our Team

Meet the Team at Windmill Wellness Ranch

Windmill Wellness Ranch is a clinician-owned team of medical providers, therapists, nurses, and support staff with deep experience in addiction and co-occurring mental health treatment. Together, we bring a shared commitment to whole-person healing on our 75-acre ranch in the Texas Hill Country.

Shannon Malish

Founder



Dmitry Listengarten, M.D.

Medical Director

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Lauren O'Connor

Clinical Director, LCSW-S

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Heidi Cullen

Director of Nursing, RN

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Audrey Graham

Chief Financial Officer



Anantya Chandra

Chief of Staff



Melissa Woolsey

Director of Utilization Management, LCDCi

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Debbie Roach

Director of Human Resources

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Julianna Santiago

Director of Field Operations and Admission

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Chantel Long

Director of Marketing



Brian Erb

Nurse Practitioner, APRN-CNP



Eric Feagins

Nurse Practitioner, RN,
APRN-CNP



Elizabeth Henderson

Program Coordinator, Therapist, LCSW, LCDC

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Casey Arrillaga

Team Leader for Education and EAP Relations, Therapist,
LCSW-S, LCDC

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Johanna Sikaffy

Therapist, LPC, IOP Manager

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Sheli Schmidt

IOP Therapist, LMSW

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Jeremy Simon

Therapist, MS, LPC, LCDC

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Denise Garcia

Therapist, LCDC, LMSW



Shannon O'Connor

Therapist, LPC



Alyssa Contreras

Therapist, LCDCi, LPCA



Selena Varney

Therapist, LMSW



David Leija

Therapist, LMSW



Emily Wallen

Therapist



Brandy Heller

Recovery Coach Coordinator, RSPS



Kira Arrillaga

Recovery Coach



Miles Douglas

Recovery Coach



Max Schenker

Recovery Coach



Kristi Reca

Recovery Coach



Sarah Kreusel

Clean Living & Alumni Coordinator



Ready to Talk With Our Team?

Our admissions team is available 24/7 to answer your questions and help you or your loved one take the first step toward recovery.

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Dmitry Listengarten, M.D.

Medical Director

Dr. Listengarten has been practicing medicine since 1986 and he specializes in the field of psychiatry and addiction medicine. He is a Fellow of the American Board of Psychiatry and Neurology and a Fellow of the American Board of Addiction Medicine.

Throughout his career, he has focused on addictive disorders and treatment of co-occurring disorders. He has served as attending psychiatrist in several hospitals in Arizona and Texas. He served as Chairman of the Department of Psychiatry and the Director of Chemical Dependence Unit at HCA Methodist Specialty and Transplant Hospital. He continued his practice at San Antonio Behavioral Health Hospital and currently serves as Director of Chemical Dependence Unit. He also practices at Soba Texas providing psychiatric and chemical dependency consultations and treatment to patients in all levels of care. Dr. Listengarten is also certified in TMS.

Lauren O'Connor

Clinical Director, LCSW-S

Like many families across the United States, Lauren's own family has been touched by addiction - and that experience has been the foundation of her commitment to this work. She earned her Master of Science in Social Work from the University of Louisville and began her career in community mental health as the team lead for an Assertive Community Treatment (ACT) team, providing wraparound services to individuals with serious mental illness. That passion for meeting people where they are led her to Windmill Wellness Ranch in 2019, where she found a home for her belief that recovery is possible for everyone.

Since joining Windmill, Lauren has grown through roles as therapist, program coordinator, and now Clinical Director - bringing both clinical depth and organizational vision to each position. In her current role, she leads a team dedicated to delivering high-quality, evidence-informed care. Lauren approaches leadership the same way she approaches clinical work: with curiosity, accountability, and a genuine investment in outcomes. She is driven by the goal of building programs that not only meet people in their hardest moments, but give them real tools to carry forward into lasting recovery.

Heidi Cullen

Director of Nursing

Heidi is a Registered Nurse and has been in the nursing field since 1979 where she first received her CNA. She then went on to receive her LVN in 1984 and obtained her RN license in California in 1991.

She has been practicing in Texas since 2004 and her passion for the mental health field has only grown. She is a valuable resource and is dedicated to her nurses and the clients. She adores her two beautiful children and her plethora of dogs.

Melissa Woolsey

Director of Utilization Management

Melissa and her husband of 30 years owned and operated a successful foam roofing company for several years. Melissa assisted in the sales, contracting, and managed the daily operations of the business. Melissa also has education and experience in medical, banking, law and customer service industries all playing a vital role in her current position of Direction of Utilization Management at Windmill Wellness Ranch since 2019.

Melissa began her employment at Windmill as a Wellness Advocate. She moved into an admission coordinator position after demonstrating her abilities and skills interacting with clients then quickly into Director of Admissions. Melissa is currently furthering her education in the field of addiction.

Debbie Roach

Director of Human Resources

Debbie Roach is a Human Resources Professional who began her HR career in banking and has worked the past 20 + years in Human Resources in the healthcare industry with Methodist Healthcare System.

She received a Bachelor of Science degree in Management in 2009 from Wayland Baptist University of San Antonio, Texas and attained her Master’s degree of Arts specializing in Human Resources from Wayland Baptist University of San Antonio, Texas in June, 2018.

Julianna Santiago

Director of Field Operations and Admission

Jules has lived all over the country and settled in her final home in Canyon Lake, Texas in 2018. She has worked for Windmill Wellness Ranch since that time, wearing many hats, until she found her passion as Director of Admissions.

Jules herself is in recovery and shares her experience, strength and hope everyday. She isn’t just there to admit people, she is there for the clients the whole way through their journey. “Whether it’s God, Higher Power or whatever you may believe, it’s here! It’s a place where miracles happen”.

Elizabeth Henderson

Therapist, LMSW

Liz graduated with a master’s in social work from Texas State University and a bachelor’s in social psychology from Park University along with two other degrees in Human Services specializing in Addiction Counseling and Psychology. She is a Licensed Master Social Worker (LMSW) and Licensed Chemical Dependency Counselor (LCDC) with years of experience starting in a mental health respite environment in 2009.

Liz started her career in the addiction recovery field as a Recovery Advocate in 2016 working with teens in residential treatment and has advanced from there working with both adolescent and adult populations. There have been many challenges and obstacles in her path, but even more support both professionally and personally. If there is one thing Liz has learned over the years working in this field is that recovery, whether it be from substance use disorders or Mental Health, is not something we can do alone. The beauty of it is that we don’t have too. Liz strives to meet people where they are and walk alongside them in their healing journey. As a trauma informed therapist, she is passionate about supporting individuals’ personal empowerment while utilizing a person first and strengths-based approach. She believes in treating individuals with dignity and respect while they navigate life. Liz was born on an Airforce base in Wiesbaden, Germany to parents of different ethnic and cultural backgrounds.

Throughout her childhood and in adulthood, she has traveled and lived in several different countries and states. Having grown up exposed to different cultures both in the places she lived and at home, cultural awareness and humility are apparent in her practice. She remains curious to explore cultural implications in recovery and how this can impact a person’s experience. She believes that therapy is not a one size fits all experience therefore it is beneficial to explore personal beliefs and background. Liz enters each session with the goal to provide individuals with the knowledge, skills, and resources to continue their personal growth and success long after they leave treatment while providing a safe space to process all the things.

Casey Arrillaga

Team Leader for Education and EAP Relations, Therapist, LCSW, LCDC

Casey Arrillaga is a Licensed Clinical Social Worker and Licensed Chemical Dependency Counselor with years of experience in working with people of all kinds who have trouble with using substances or behaviors compulsively, as well as helping those people and their families heal and grow together.

Casey comes with a positive, strengths-based approach that helps everyone involved see that they are good people struggling with a difficult condition. Casey believes that everyone deserves relief from that struggle and he takes joy in helping others learn to heal, grow, and ultimately soar. He also has extensive experience helping family members understand how they can support both themselves and their loved one, while not falling into patterns of codependency and enabling.

Casey received his Master of Social Work with an emphasis in clinical studies from Boston University, and his undergraduate studies were in Chemical Dependency Counseling.

Johanna Sikaffy

Therapist, LPC, IOP Manager

Johanna is a licensed professional counselor and a national certified counselor who received her BA in psychology from St Peter's College and her MA in counseling from NJCU in New Jersey. She worked at a Partial Hospital Program in New Jersey for dual diagnosed adults since 2004 and has been at WWR since January 2021. She is fluent in Spanish. She has personal experience with mental health and substance abuse.

She was born and raised in New York and relocated to Texas upon her husband's retirement from the Air Force and police department. As a military wife of a retired combat veteran and a police officer, Johanna has the knowledge and experience with trials and tribulations of coping with daily struggles. She believes that with therapy and the right wellness tools, an individual will be able to lead a full and productive life. Her passion is to assist individuals learn how to make healthy decisions about themselves, relationships and their futures.

Sheli Schmidt

IOP Therapist, LMSW

Sheli grew up in West Texas and moved to the Hill Country in 2018. She graduated from West Texas A&M University with a Bachelor of Science in Interdisciplinary Studies and went on to become a Teacher. After experiencing several losses in her family and through her own personal recovery journey, she began to realize her true calling was to continue to help others in the way of Counseling.

Sheli graduated from the University of Texas at Arlington with her Masters in Social Work with a concentration of Mental Health and Addiction. Sheli believes in a holistic approach to treatment that includes treating the mind, body and spirit. Her passion is helping those who suffer from trauma, grief, mental health and substance use disorders.

Jeremy Simon

Therapist, LPC

Before moving into the world of treating mental health and addiction, Jeremy spent 20 years in the U.S. Navy, primarily in aviation working with helicopters, attack, fighter, and patrol aircraft as an Aircrew Survival Equipmentman (also known as Parachute Riggers) with deployments supporting combat operations in both Afghanistan and Iraq.

After the Navy, Jeremy completed his Bachelors of Science in Psychology and Masters in Counseling Psychology (Mental Health focus) at Chaminade University of Honolulu. As a part of completing his Masters program Jeremy began working with substance abuse due to seeing the link between service member’ self-medicating for trauma and other issues coupled with difficulty obtaining mental health services or as a result of being overprescribed medications during and after their active duty time.

Jeremy carries the belief that the connection between trauma and addiction is thoughts, feelings, emotions, and behaviors and specializes in the complex trauma experienced by our Nation’s Veterans, Military, and First Res responders.