Purpose: Experiencing an event that involves actual or threatened death or serious injury is a critical incident and produces serious emotional responses. Athletic trainers (ATs) experience critical incidents in their day-to-day work. The purpose of this study was to explore how ATs experience a critical incident during the course of clinical practice. Methods: We used one-on-one, web-based, semi-structured interviewing with a criterion sample of ATs who experienced a critical incident and used any critical incident response resources in the last year (n=17; age=32±8; years of experience=9±7; years in current position=4±5). We used a 3-person team with a multi-phase process to identify the emerging domains and categories. Results: Two emergent domains were identified from the study. External support referenced multiple personnel resources available after a critical incident occurred, specifically, trained mental health professionals, untrained personnel, and trusted colleagues/coworkers. Coping with the emotional response included debriefing, spirituality, and complementary mental health strategies. Conclusion: In preparation for critical incidents, emergency action planning and after-action planning for healthcare delivery and the emotional response are both essential. Many ATs do not have the formal training, but continuing education courses, community-based mental health resources, and the promotion of professional organization resources can assist ATs in critical incident management.