Research Design and Methods This study will pilot test a cognitive behavior therapy (CBT) intervention for persons with mental illness to target improved competitive employment outcomes, termed the "CBT for Work Success (CBTw) program"; this CBT intervention will serve as a compliment to existing supported employment services in the VA. Fifty participants will take part in the 12 week group-based CBTw program. All participants will receive standard SE services during the study. The longitudinal design will consist of assessments of competitive employment outcomes, important psychosocial outcomes, and background and demographic variables at baseline and at two follow-up periods-immediately following the conclusion of the CBTw program and six months after the conclusion of the program.