Concussion is one of the most challenging injuries for sports medicine clinicians. It is crucial that students develop high self-efficacy for concussion-relevant skills during professional education, as it impacts the quality of their patient care. This study aimed to explore Irish final year athletic therapy students’ self-efficacy in concussion assessment and management and the factors that impact its development. Participants’ level of self-efficacy varied, from low to high, depending on the skill assessed. Lack of practice and lecturer’s positive feedback impacted student self-efficacy the most. Educators should provide students with an opportunity to practice their skills in an environment that facilitates feedback.