Veterans with mild traumatic brain injury (mTBI) and post-traumatic stress disorder (PTSD) commonly experience cognitive impairments including attention and executive function deficits that interfere with their ability to engage in productive personal and social activities. Of the limited interventions available to address cognition, none rigorously train attention beyond strategy management. This study will evaluate an innovatively combined strategy training known as Goal Management Training plus computerized attention training in Veterans with mTBI/PTSD. Preliminary testing suggests an effectiveness in improving problem solving, attention and functional tasks in a small number of Veterans. Considering these promising results, cost effectiveness, and the demand for access to care from Veterans living in rural areas, a Randomized Controlled Trial will determine and compare the effects of this treatment, administered either in-person or via telehealth, on executive function, attention, other aspects of cognition and real life functional tasks.