Matthew D. Kliethermes, Ph.D., is a Missouri Licensed Psychologist/Health Services Provider at Children’s Advocacy Services of Greater St. Louis (CASGSL) and an Associate Clinical Professor in the Department of Psychology at University of Missouri-St. Louis (UMSL). He received his B.S. in Psychology at Truman State University (1996) and his M.S. (2000) and Ph.D. (2003) in Clinical Psychology at Saint Louis University. He completed his predoctoral internship at La Rabida Children’s Hospital in Chicago, IL and his postdoctoral fellowship at the Center for Trauma Recovery at UMSL. Dr. Kliethermes has over 12 years of experience working with traumatized youth and has received extensive training in this area, including exposure to multiple trauma-focused, evidence-based practices [e.g., Trauma-Focused Cognitive-Behavioral Therapy (TF-CBT)]. Currently, Dr. Kliethermes provides direct clinical services to children exposed to trauma and their non-offending caregivers, supervises the clinical work of mental health trainees, and provides frequent training and consultation at local, state, and national levels. Dr. Kliethermes is an approved national TF-CBT trainer with multiple publications related to the implementation of TF-CBT with youth exposed to complex trauma. His primary professional interests include complex trauma, assessment and diagnosis of traumatized youth, and effective trauma-focused engagement strategies.