Objective: This investigation examined the effect of mindfulness on subjective and objective measures of attention for adults with persistent post-concussion symptoms (PPCS). Evidence indicates various mindfulness practices can improve cognitive skills among different populations. However, research utilizing mindfulness as an adjunct to speech-language pathologist (SLP) facilitated cognitive therapy for individuals with PPCS has yet to be studied. Method: This A-B-A withdrawal, single-subject research design included three adults with a concussion diagnosis, self-report of PPCS, and prior participation in outpatient cognitive therapy. Participants attended two weekly mindfulness sessions for six weeks via telehealth where they engaged in a guided 10-minute mindfulness practice focusing on one’s breath. Attention was measured subjectively via bi-weekly completion of The Mindful Attention Awareness Scale (MAAS; Brown & Ryan, 2003). Results: All three participants demonstrated increased MAAS scores during the treatment phase compared to baseline scores. The magnitude of change varied among participants. One participant presented statistically significant increases in MAAS scores compared to their baseline scores, and one showed improvement when comparing pre-and postintervention objective attention scores. Conclusion: The findings of this investigation support the potential of using mindfulness as an adjunct to cognitive therapy for adults with PPCS and confirm the need for additional research exploring the impact of mindfulness in speech-language pathology.