The objective of this trial is to evaluate the effectiveness of cognitive rehabilitation in OIF/OEF service members with a history of mild traumatic brain injury and persistent (3-24 months post injury) cognitive complaints. This is a prospective, randomized, control treatment trial of cognitive rehabilitation for OEF/OIF Service Members with a history of mild traumatic brain injury (mTBI) and persistent (3-24 months post-injury) cognitive complaints. Subjects will be recruited from consecutive patient referrals to the TBI Service at SAMMC-North. Patients who meet eligibility criteria and consent to participate in the treatment trial will be randomly assigned to one of four, 6-week treatment arms of the study. Subjects will be evaluated prior to the start of treatment and 3, 6, 12, and 18 weeks following the initiation of the study. The total number of patients to be studied is 160 (maximum), which is approximately 20 patients per month.