Mild traumatic brain injury (TBI) accounts for the majority of TBIs. Most cases recover within 3 months and usual medical advice covers physical and cognitive rest, activity and fatigue management, and education. However, in some cases, symptoms can persist and there may be ongoing postconcussion difficulties. It is well established that pre- and postinjury psychological factors can contribute to cases of persistent postconcussion symptoms. However, there are few illustrative case examples in the published literature on mild TBI. This case example demonstrates the pivotal role that preinjury psychological factors can play in recovery from mild TBI, using an example of a 35-year-old woman with persistent mild TBI symptoms who had a limited response to previous brief treatment through a Concussion Clinic. Through the process of assessment and development of a psychological case formulation, preinjury psychological factors that had been barriers to recovery and prior rehabilitation efforts were identified. Rehabilitation counselors are equipped to (1) identify and address such barriers, (2) communicate this information to other rehabilitation professionals in the treatment team to facilitate a shared understanding of how factors might affect the client’s functioning and (3) contribute to team case formulation.