Our Staff

Ryan Drzewiecki, PsyD, LP

Clinical Director

Ryan Drzewiecki is an experienced leader and administrator with over fifteen years of experience in behavioral health administration. Dr. Drzewiecki graduated from Northwestern University in 2003 and began his career in special education and group home administration, and was the co-founder of a behavioral health outpatient clinic in Phoenix, Arizona. Ryan enrolled in graduate school and earned his doctoral degree in Clinical Psychology at the Arizona School of Professional Psychology in Phoenix. During graduate school Ryan trained with populations struggling with substance use and mental health and worked in residential, partial hospitalization, intensive outpatient, and outpatient settings. He completed his internship and postdoctoral work at Hazelden Betty Ford Foundation in Center City, Minnesota. After graduation, Ryan served as Clinical Director of A New Leaf in Mesa and All About You Behavioral Health in Arizona. He founded Mara Psychotherapy Group in Arizona and Colorado, specializing in process addiction treatment, psychological and neuropsychological evaluations, and consultation for behavioral health agencies. Most recently Dr. Drzewiecki served as the Director of Clinical Operations and Programs at All Points North Lodge in Edwards, Colorado.

Dr. Drzewiecki is currently a licensed psychologist in Arizona and Colorado. He has served on the board of the Arizona Psychological Foundation and The Family Learning Center, and is a monthly training facilitator for the Colorado Internship Consortium. He specializes in program development, from startup tasks to performance improvement and quality assurance. He is passionate about training and staff development and enjoys clinical supervision and training opportunities. He has areas of interest in organizational efficiency and company culture, effective leadership and morale, substance use and process addiction, attachment theory and process-experiential/intersubjective approaches to psychotherapy, projective testing, and postmodern perspectives on mental health. Ryan is excited to return to Arizona and join the esteemed team at Sierra Tucson.

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The time spent at Sierra Tucson was the true beginning of my journey. Not only did I overcome my addictions, but I began to focus on the root causes that created my compulsions. I understand myself so much better now.

– Anonymous Client
Marks of Quality Care
These accreditations are an official recognition of our dedication to providing treatment that exceeds the standards and best practices of quality care.
  • Equine Assisted Growth and Learning Association (EAGALA)
  • GeneSight
  • National Association of Addiction Treatment Providers (NAATP)
  • National Association of Psychiatric Health Systems (NAPHS)
  • Neurostar