Health service psychology (HSP) students are at a high risk of burnout and physical and mental health problems (El-Ghoroury et al., 2011; Rummell, 2015). Research has begun to explore environmental factors within training programs that cause or prevent burnout (e.g., Kovach Clark et al., 2009; Swords & Ellis, 2017). Using the Job Demands-Resources (JD-R) model of burnout (Bakker & Demerouti, 2017; Demerouti et al., 2001), the present study assessed the relationships between demands, resources, and burnout symptoms in a sample of HSP doctoral students. Structural equation modeling was used to test the JD-R model and compare the relative contributions of perceived workload, weekly work hours, sense of community, work environment, and relationships with academic advisors and clinical supervisors to students' symptoms of exhaustion and disengagement. Analyses of variance were used to explore demographic group differences to better understand the experiences of diverse students, especially those with minoritized identities. Participants reported high levels of burnout symptoms, especially exhaustion. The hypothesized JD-R model, which contains unique and separate pathways representing the processes by which job demands sap energy and job resources promote engagement, did not yield interpretable parameters and thus was not a good fit to the data. However, an alternative model containing additional pathways between job demands and resources and burnout symptoms fit the data well and collectively predicted about half (50.8%) the variance in exhaustion and about a third (31.8%) of the variance in disengagement. The results demonstrated HSP doctoral students' experiences of burnout are highly linked to environmental factors. High demands impair students' health and create exhaustion, while lacking resources impair motivation and create disengagement. Perceived workload, sense of community, and the work environment had the largest effects on burnout symptoms, followed by the advisory relationship, weekly work hours, and the supervisory relationship. Students with marginalized racial or ethnic identities reported greater exhaustion and disengagement. Lower SES students reported more exhaustion, less sense of community, and less perceived support from the work environment. Strengths and limitations of the study, implications for research and training, and specific recommendations for reducing burnout and promoting well-being will be discussed. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]