ABSTRACT Despite prevalent trauma exposure among patients seeking health care, as well as widespread frameworks for enacting trauma-informed care, the uptake of trauma-informed practices such as trauma screening and referral among health-care providers remains relatively low. The current study sought to assess the roles of health-care providers’ personal histories of adverse childhood experiences (ACEs) and personal beliefs in the just-world hypothesis in understanding their attitudes toward trauma-informed care. Advanced practice graduate nursing students (N = 180; M age = 34.6 years) completed a self-reported survey assessing their personal history of ACEs, global belief in a just world, and attitudes related to trauma-informed care. Results indicated the relation between providers’ ACEs and attitudes toward trauma-informed care was fully mediated by their beliefs in a just world, such that providers reporting higher ACEs scores also report greater endorsement of attitudes consistent with trauma-informed care due to less belief in a just world. Implications for both health-care providers’ themselves and cultural shifts necessary for provision of trauma-informed health care are discussed.