 This study will test a modification of Cognitive Processing Therapy CPT for Post-Traumatic Stress Disorder, PTSD in which CPT is augmented with compensatory cognitive rehabilitation principles from the Cognitive Symptom Management and Rehabilitation Therapy CogSMART intervention to create a hybrid treatment, SMART-CPT. This study investigates the efficacy of SMART-CPT in improving PTSD and post-concussive symptoms, cognition, quality of life, and treatment compliance in those with a history of mild to moderate TBI and persistent cognitive complaints. 