Inclusion Criteria:  mTBI defined per the VA/DoD Clinical Practice Guideline for the Management of Concussion-Mild Traumatic Brain Injury (CPG; Corrigan & Bogner, 2007) sustained in any context (deployment-related or non-deployment-related) and at any time longer than 6 months previously; A score of 3, 4, or 5 on any of the four Cognitive items on the NSI, to include participants who have cognitive complaints; and A score on the Word Reading Subtest of the Wide Range Achievement Test of a sixth-grade reading level or higher, to ensure participants can read study materials.  All individuals in this study population must meet all of the inclusion criteria in order to be eligible to participate in the study  Exclusion Criteria:  History of TBI (any severity) within 6 months of enrollment. History of a moderate, severe, or penetrating TBI as defined by DoD/VA guidelines. Lifetime diagnosis of schizophrenia or other psychotic disorder. Current participation in intensive behavioral health treatment (>5 appointments/encounters per week) for major depressive disorder, post-traumatic stress disorder (PTSD), bipolar disorder, or substance-related disorder. History of a neurological disease other than mild TBI such as multiple sclerosis, cerebral vascular accident, brain tumor, neurodegenerative disease, or neuro-motor disorder. Current, active suicidal or homicidal ideation. A score of <45 on Trial 2 of the Test of Memory Malingering, or a Validity 10 score of >22 from the NSI, to exclude individuals who demonstrate suboptimal effort or potential invalid self-reporting of symptoms. Daily use of narcotic pain medications.  All individuals in this study population meeting any of the exclusion criteria at baseline will be excluded from study participation.