Firefighters face many high-risk situations, from battling fires to managing hazardous materials and medical emergencies. The inherent dangers of these scenarios are reflected in the statistics from the U.S. Fire Administration, which reported 141 on-duty firefighter fatalities in 2021. Recognizing the critical need for enhanced safety, the National Fire Protection Association (NFPA) has identified the importance of advanced training and education. Simulation training and facilitated debriefings have emerged as promising avenues due to their potential to reshape behaviors and improve performance. However, the research on its impact on job satisfaction and decision-making remains limited. This mixed methods study delves into the efficacy of simulation training and facilitated debriefings within Michigan's fire services, aiming to fill the gap in literature and practice and, ultimately, to improve the preparedness, as well as the health and safety of firefighters. Utilizing a quantitative and qualitative data survey, the study reveals a positive correlation between simulation training and job satisfaction, decision-making abilities, and learner satisfaction. In addition, the study reveals a positive correlation between facilitated debriefings and job satisfaction, decision-making abilities, and learner satisfaction. These findings suggest that integrating simulation training and facilitated debriefings can significantly enhance the effectiveness of fire service training programs. The study offers recommendations for implementing these methods and discusses their potential to reduce firefighter fatalities and injuries. This research contributes to the field by providing empirical evidence supporting the adoption of innovative training practices in the fire service. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]