678-825-2320 Ext. 664
678-825-2320 Ext. 664


  • 2016: Earned MA In Clinical Psychology from Wright Institute
  • 2017-2018: Advanced Supplemental Counselor for Gateway to College (California)
  • 2018: ACT BootCamp
  • 2019: OCD, Anxiety and Emotion Regulation training with ACT, ERP, and ERT
  • 2019: Completed Internship at Arizona State University Counseling Services
  • 2019: Received PsyD in Clinical Psychology from Wright Institute
  • 2019: Completed Selective Mutism intensive training under the direction of Dr. Shelley Avny
  • 2019-2021: Clinical Postdoctoral Fellowship at Anxiety Specialists of Atlanta
  • 2021: Obtained Licensure as a Psychologist


John Mohammadioun, PsyD, is a Licensed Psychologist who utilizes evidence-based treatment approaches based in Cognitive Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT).  With a sub-specialty in the assessment and treatment of children and adolescents, Dr. Mohammadioun’s dissertation included collaborations with Child Haven, a California-based child behavioral center, to examine how a multi-intervention-based approach impacted the development of executive functioning in children experiencing severe behavioral difficulties from anxiety, learning disorders, and trauma. This work has led to Dr. Mohammadioun’s growing interest and training in the most evidence-based interventions for anxiety disorders, including obsessive compulsive disorderphobiasseparation anxietysleep difficulties in children, selective mutismsocial anxiety, and PTSD for all ages, specifically using exposure-based therapies including Exposure Response Prevention (E/RP) and ACT.

Dr. Mohammadioun started his career in psychology at University of Colorado in Boulder, majoring in psychology. This is also where he began working with Boulder Mental Health Services as a volunteer youth advocate.  From there, his academic journey brought him to Berkeley, California where he completed his doctorate in clinical psychology at the Wright Institute. Dr. Mohammadioun recently concluded his pre-doctoral internship at Arizona State University where he provided psychotherapy and crisis intervention to students.

While completing his doctoral degree, he worked as a counselor at local schools and community clinics where he provided both onsite and in-home treatment to children with cognitive and/or physical special needs.  He has a wealth of professional experience providing individual and group therapy to adolescents as well as adults. Dr. Mohammadioun strives to incorporate humor into his work while encouraging a sense of willingness to approach life’s challenges.

Dr. Mohammadioun is an Atlanta native who has lived in Colorado, California, and Arizona.  When he is not working with clients you may find him searching for the next backpacking destination or standup comedy performance.  He is an avid outdoor enthusiast who only sometimes gets his car stuck in the mud.