Joshua is a pediatric psychologist who joined Phoenix Children’s Hospital (PCH) and the Reproductive Anomalies/Disorder of Sex Development Clinic in 2015 after completing a postdoctoral residency in Health Service Psychology with specialized training in program development and healthcare for lesbian, gay, bisexual, transgender, queer/questioning, intersex, asexual (LGBTQIA) populations at the Veteran’s Affairs Medical Center in Honolulu, Hawaii. Prior to his experience with Veterans, he completed his doctoral internship residency at the University of Washington Medical School/Seattle Children’s Hospital. Dr. Kellison has special interests in the PCH Dialectic Behavior Therapy Adolescent Program, parent education, social skills, impulse control, anger management, and coping skills acquisition. He also strives to support children, adolescents, and families through transitional periods such as divorce, medical illness and recent mental health diagnoses. Beyond individual therapy, his work with LGBTQIA populations include the development of a LGBTQIA adolescent support group, conducting cross-sex hormone/puberty suppression readiness evaluations, and providing education to staff and the community on LGBTQIA health and standards of affirmative care.