The Longitudinal Emergency Medical Technician Attributes and Demographics Study (LEADS) provides a representative sampling of EMTs throughout the United States. The present study adds to the transfer of training literature by examining the relationship between instructor quality and National Registry of Emergency Medical Technicians certification examination outcomes. The effective sample size included 513 EMT-basics and 406 EMT-paramedics. The survey sample responded to questions concerning their experiences and ratings of the quality of the certification education and training. Survey respondents were matched with their certification test results, using the initial score on that exam as well as the number of test attempts. Results showed significant correlations, based on instructor quality on initial exam scores, as well as on the number of tries to obtain a passing score. Implications for HRD practitioners, adult and continuing professional educators, and researchers are discussed. (Contains 6 tables and 1 figure.)