Mild traumatic brain injury (mTBI), also known as concussion, is a common injury sustained by Veterans. While most individuals who sustain mTBI experience a complete recovery within several weeks of injury, many Veterans with history of mTBI report frequent and long-lasting neurobehavioral complaints and functional impairment. Though research suggests that these outcomes are strongly influenced by co-occurring conditions such as post-traumatic stress disorder, depression, and chronic pain, evidence-based interventions capable of addressing this wide array of concerns are lacking. This study seeks to address this gap by evaluating the effectiveness of a brief and flexible behavioral health treatment (Problem-Solving Training for Concussion, or PST-Concussion), which was designed to be delivered by generalist providers working in VA primary care settings. If PST-Concussion is shown to be effective, this skills-focused intervention may help improve Veterans' recovery experience following mTBI.