Meet LESS Staff

   Dr. Curtis Walling      


Dr. Walling is a 4th generation native Arizonan who earned his Ph.D. in Counseling Psychology (Phi Beta  Kappa) from the University of Florida in 1987.  Dr. Walling has worked as a licensed psychologist in private practice since 1987, specializing in the treatment of substance use disorders.  Dr. Walling has held past appointments as Director of Psychology at Charter Hospital, Clinical Director at Devereux Arizona, and Director of Outpatient Chemical Dependency at St. Luke's Hospital.  The designer and founder of the Project LESS CD IOP Program, Dr. Walling continues to oversee the program and ensure that the Program remains true to his original "best practices" and "evidenced based" philosophy.  Currently Dr. Walling continues to serve as the Clinical Director of the Project LESS CD IOP Program, and he is proud to have his daughter Alexa join him in the family Counseling business.

   Alexa Moreno, M.S.       


Alexa Moreno ("Lexi") earned her Bachelor of Science degree cum laude from Arizona State University in 2012.  She earned her Master’s degree in Addiction Counseling at Grand Canyon University in 2014, and is pursuing independent licensure as a Licensed Independent Substance Abuse Counselor.  As a Behavioral Health Technician, she is currently a therapist working at both Project LESS and also at the Adolescent Substance Abuse Program (ASAP).  Lexi has more than ten years of experience working in the field of substance abuse.   Lexi works well with a cognitive-behavioral model and Stages of Change theory, and she has strong program design and evaluation skills in addition to her clinical expertise.

   Nathan Thompson, PsyD      


Dr. Nathan Thompson earned his doctorate in Clinical Psychology from the American School of Professional Psychology in 2012.  Dr. Thompson became an Arizona Licensed Psychologist in June 2013.  He is an Arizona native and has been working with Project LESS in 2008.  He has worked closely with Dr. Walling at Project LESS as well as the Adolescent Substance Abuse Program (ASAP).  Dr. Thompson works as a supervising psychologist at Project LESS while also operating his own private practice as a Psychologist in Tempe, Arizona

   Robyn Merchant, M.A.      


Robyn Merchant earned her Bachelor of Science degree in Psychology from Southern Illinois University-Edwardsville in 2012.  Robyn worked as a substance abuse counselor at Chestnut Health Systems in Illinois until 2013.  Robyn moved to Phoenix, AZ to pursue her Master of Arts in Professional Counseling from Ottawa University, which she received in 2015.  She is currently a therapist for ASAP, the Adolescent Substance Abuse Program, and also a therapist for our Project LESS CD IOP Program.  Robyn demonstrates impeccable Motivational Interviewing skills in her clinical work.  Robyn is known for her empathic nature and passion for helping others, as shown through her dedication in organizing the 2011 and 2012 Out of the Darkness Walks for the American Foundation for Suicide Prevention in Edwardsville, Il. 

                          Learning Effective Sobriety Skills

                                                 Intensive Outpatient Substance Abuse Program


                                                 3660 E. University #6b,   Mesa, Arizona 85205                   


Phone  (602) 820-7509

Fax  (480) 704-5550

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