Psychotraumatology Institute Europe
- Aims to foster continuing education, research of chronic traumatization, and dissociative disorders.
- http://www.psychotraumatology-institute-europe.com/

The International Society for the Study of Trauma and Dissociation
- Designed for mental health professionals, this organization is devoted to research, training, treatment of trauma, and dissociative disorders.
- http://www.isst-d.org/

UK Society for the Study of Dissociation
- The study of this condition and its links with complex trauma, attachment, and PTSD. It describes information on training, conferences and an expanded area for members.
- http://www.ukssd.org/

The New England Society for the Treatment of Trauma and Dissociation
- Provides resources for professionals interested in dissociative disorders through the organisation of meetings and continual professional development opportunities.
- http://www.nesttd.org/

Dissociation Australia
- Provides a service to locate a therapist, information on research, training, and dissociative disorders.
- http://www.arts.monash.edu.au/behaviour/dissociation/

The European Society for Trauma and Dissociation
- Promotes an increase in the knowledge of trauma, dissociation and all disorders related to chronic traumatization.
- http://www.estd.org

Argentine Society for Psychotrauma
- Provides details of training and open access to relevant articles from the Ibero American Journal. Available in English and Spanish.
- http://www.psicotrauma.org.ar/marcosi.htm