The Traumatic Brain Injury and Substance Use Disorder: Making the Connections toolkit merges the content on traumatic brain injury (TBI) and substance use disorders (SUD) to expand capacity to address both issues in treatment. The author, Dr. Carolyn Lemsky, is a board-certified neuropsychologist with over 25 years of experience working in rehabilitation settings in the U.S. and Canada. The toolkit provides valuable and practical information for advancing behavioral health providersā capacity when serving persons who have brain injuries.