# Trauma Professionals Association (TPA) > International authority on trauma certification, education, and applied research. Evidence-based programs trusted by 25,000+ clinicians across 85 countries. TPA (formerly IATP — International Association of Trauma Professionals) certifies clinicians, researchers, and allied professionals in trauma-informed care. Programs blend self-paced modules with live cohort consultation and supervised practice. ## Pages - [Home](/): Overview of TPA and the certification pathway. - [About](/about): Mission, faculty, and history. - [Certifications](/certifications): Full catalog of certification programs. - [FAQ](/faq): Common questions on eligibility, CE accreditation status, and recognition. - [Contact](/contact): Talk to an advisor. - [Community](/community): Global network, alumni, and local accreditation partnerships. - [Knowledge Hub](/knowledge-hub): Clinical articles on trauma theory and practice. - [Blog](/blog): Essays from TPA faculty. ## Certification programs - [CPT-I Foundations in Trauma](/cpt-i-foundations): Entry-level, 40 program hours. - [CPT-II Advanced Trauma Treatment](/cpt-ii-advanced): 60 program hours. - [CPT-III Dissociation Specialist](/cpt-iii-specialist): 80 program hours. - [Vagal Safety Certification (VSC)](/vagal-safety-certification): Polyvagal-informed clinical work. - [Trauma-Informed Somatic Certification (TSC-I)](/trauma-informed-somatic-certification): 100 program hours. - [Treatment of Sexual Abuse Trauma (CT-SAT)](/treatment-of-sexual-abuse-trauma): 120 program hours. - [Behavioral Addictions Trauma Certificate (CAT-I)](/behavioral-addictions-trauma-certificate): 110 program hours. - [Narcissistic Abuse Trauma Specialist (CNAT)](/narcissistic-abuse-trauma-specialist): 100 program hours. - [Psychedelic-Assisted Therapy for Trauma (CPAT-I)](/psychedelic-assisted-therapy-for-trauma): Legal-context education. ## Selected articles - [What is trauma?](/knowledge-hub/what-is-trauma) - [What is complex trauma (C-PTSD)?](/knowledge-hub/what-is-complex-trauma) - [PTSD vs. C-PTSD](/knowledge-hub/ptsd-vs-cptsd) - [Trauma and the nervous system](/knowledge-hub/trauma-and-the-nervous-system) - [Evidence-based trauma treatments](/knowledge-hub/evidence-based-trauma-treatments) - [Window of tolerance](/knowledge-hub/window-of-tolerance) - [Case formulation in complex trauma](/knowledge-hub/case-formulation-complex-trauma) ## Optional - [Pacing in phase-based treatment](/blog/pacing-in-phase-based-treatment) - [What the polyvagal model actually predicts](/blog/polyvagal-what-it-predicts) - [Cultural humility in trauma care](/blog/cultural-humility-in-trauma-care) - [Vicarious trauma in the first five years](/blog/vicarious-trauma-first-five-years)