Prior to joining Alsana, Johnny served as the Medical Director at Timberline Knolls Residential Treatment Center in the Chicagoland area, caring for individuals diagnosed with various eating disorders.  He has over 6 years of experience in the treatment of eating disorders.

Dr. Williamson completed his undergraduate degree at the University Of Illinois at Urbana-Champaign.  He earned his medical degree at Meharry Medical College in Nashville, Tennessee.  Subsequently, he completed both general psychiatry and child and adolescent residencies at the University of Illinois at Chicago.  Dr. Williamson spent much of his early career in community psychiatry, forensic psychiatry and hospital-based work.  More recently Dr. Williamson provides care in a mix of inpatient work, residential treatment and private practice.

Dr. Williamson is board-certified in General and Child and Adolescent Psychiatry and has over 20 years of experience in mental health.