The compelling evidence regarding the prevalence and profound impacts of traumatic experiences on individuals with disabilities underscores the need to establish trauma-informed service environments within vocational rehabilitation (VR). In an initial endeavor towards cultivating trauma-informed service, this study investigates the VR counselors’ professional training experiences in the topical areas of trauma. Further, the applicability of the Technology Acceptance Model (TAM 2) is examined in elucidating the utilization of trauma knowledge by VR counselors in their practices. A needs assessment focusing on trauma training was distributed to 169 VR counselors to measure their trauma-related training history and utilization of trauma knowledge in practices. Path analysis was employed to examine the relationship between training experience and the actual use of trauma knowledge in counseling based on the TAM 2 framework. Participants reported having 9.71 hours of post-graduate training. Path analysis suggested adding three additional paths to the original research model, explaining how post-graduate training leads to the use of trauma knowledge in VR service through perceived ease of use, usefulness, attitude toward using, and behavioral intention. The profession of rehabilitation counseling needs to incorporate more trauma-related training into its practice, education, and research to better serve individuals with disabilities and improve the effectiveness of services.