The Canadian Psychological Association, or the CPA, is the national professional association of psychologists and counts students, researchers and health care providers among its membership of over 7,000.

“The European Society of Traumatic Stress Studies promotes the sharing of knowledge and experience about all aspects of psychotraumatology. We do this by fostering research and best practice, building networks, and by contributing to public policy at a European level.”

The International Society for Traumatic Stress Studies is dedicated to sharing information about the effects of trauma and the discovery and dissemination of knowledge about policy, program and service initiatives that seek to reduce traumatic stressors and their immediate and long-term consequences. ISTSS is an international interdisciplinary professional organization that promotes advancement and exchange of knowledge about traumatic stress.

Japanese Society for Traumatic Stress Studies (JSTSS) is a professional membership organization devoted to advancement of understanding of traumatic stress and treatment of the affected people, through exchange of scientific knowledge and clinical experience. JSTSS is comprised of various professionals undertaking trauma research, treatment, and support.