The River Source - 12 Steps Holistic Drug & Alcohol Treatment Center

Our Friendly Staff

Dr. Walmer Medical Director
Dr. Walmer
Medical Director

Dr. Mark Walmer has a passion for treating people with chemical dependency. He has education and vast experience to address all types of chemical addictions. One of Dr. Walmer's goals is to have people live a life free of chemical dependency. Certifications: American Board of Internal Medicine, diplomate, Certificate No. 113415; American Board of Addiction Medicine (formally American Society of Addiction Medicine); American Society of...

Dr. Dave Arneson Naturopathic Medical Doctor
Dr. Dave Arneson
Naturopathic Medical Doctor

Dr. Arneson started his education at the University of Texas at El Paso, where he received his Bachelor of Science degree in 1992 (with Honors) with a double major in Biology and Psychology. From 1994 to 1996, he continued his education at the University of Texas at El Paso and the El Paso Community College where his focus was on organic chemistry. In 1994 he received the necessary training to be certified by the American Board of Hypnotherapy in...

Dr. Terranella
Naturopathic Medical Director, Mesa Center

Naturopathic Physician with a primary care focus and strong background in integrative medicine. Passionate for finding integrative health care solutions to those in need. Special interests, training in diabetes, cardiovascular and addiction disease. Doctor of Naturopathic Medicine 2001-2006 Bastyr University Kenmore, WA Research
  • Methadone clinic treating patients for drug and alcohol addiction.
  • BCNH Retrospective chart analysis-...

Dr. Andrea Palmer N.M.D.
Dr. Andrea Palmer
N.M.D.

Dr. LaCoss completed her undergraduate education in 2006 at Carroll College in Waukesha, Wisconsin, where she earned her Bachelor of Science with a major in Human Biology. As part of her studies at Carroll College, Dr. LaCoss initiated her own research project that looked at the effects of acute and chronic stress on the body. After graduating from Carroll College, Dr. LaCoss moved to Arizona to attend the Southwest College of Naturopathic Medicine...

Liz Martin Vice President of Operations
Liz Martin
Vice President of Operations

Liz Martin received a Bachelor of Science in Business Administration from Central Washington University in 1999 with emphasis in Human Resource Management and Organizational Theory. She also has over 15 years of experience in the restaurant industry working at various operating levels throughout the Pacific NorthWest. Her own personal struggle with addiction is what brought her to The River Source several years ago. Today she has a new life filled with hope, faith and courage. Liz is...

Jenny Cilwa
Jenny Cilwa
Executive Director - Casa Grande

Jenny Cilwa has 10 years experience, personally and professionally, working extensively in the areas of addiction, chemical dependency, dual diagnosis, eating disorders, trauma, group and family therapy.
Jenny’s professional career includes working with families struggling with the impact of addiction and working with men and women in addictions, specific to substance abuse, co-dependency, and grief and loss. Jenny applies special...

Geffen Liberman
Counselor - Masters Level, LISAC

Geffen Liberman, Licensed Independent Substance Abuse Counselor is a substance abuse counselor and an interventionist in private practice in Gilbert, Arizona. Geffen is a LISAC in Arizona and is also board certified in the state of Missouri. Geffen has been counseling substance abusers and their family members for over 11 years and has been performing the art of intervention for over 10 years. Geffen has worked with thousands of families in that...

Leonard W. Days
Counselor, MA - LISAC

Leonard has been a substance abuse counselor for over twenty-five years. He has specialized in relapse prevention for the majority of his career in the recovery treatment field. Leonard has facilitated both primary care and aftercare groups. He is a past faculty member of the Symposium of Addictive Disorders, and of the Southwestern School of Behavioral Health Studies. The enthusiasm and momentum that Leonard adds to our groups stems from his desire...

Testimonials Dwne erro

"I choose the River Source through an online google search. After placing a call, I received a call back from a staff member within an hour at that time I had a check in time and date. My experience at The River Source was very positive and educational. The staff was caring of my needs and provided me the necessary tools to be successful in my recovery. Life is now positive and full of hope. I would recommend The River Source over any other treatment center.   Sincerely, Ronald C."
Ronald C. - June 2012
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Meet Our Staff

Geffen Liberman
Counselor - Masters Level, LISAC
Dr. Dave Arneson Naturopathic Medical Doctor
Dr. Dave Arneson
Naturopathic Medical Doctor
Dr. Walmer Medical Director
Dr. Walmer
Medical Director
Jenny Cilwa
Jenny Cilwa
Executive Director - Casa Grande
Liz Martin Vice President of Operations
Liz Martin
Vice President of Operations
Dr. Andrea Palmer N.M.D.
Dr. Andrea Palmer
N.M.D.