The research objective was to determine the effect of certification, leadership, job satisfaction, and work ethic on the performance of Islamic Education teachers in Badung Regency. The research design is descriptive quantitative on 60 teachers. The data collection technique was a questionnaire and then analyzed using Structural Equation Modeling with Partial Least Squares (PLS-SEM). Research result; (1) Certification has a direct and significant effect on teacher performance with a coefficient of 0.449 and T-statistic 2.085 P-Values 0.040 (2) Leadership has a direct and significant effect on teacher performance with a coefficient of 0.210 and T-statistic 2.856 P-Values 0.030 (3 (5) Certification has an indirect effect on teacher performance through job satisfaction. (6) Leadership has an indirect effect on teacher performance through job satisfaction. The findings of this study are that Certification and Leadership have a very strong effect on teacher performance. The indirect effect of job satisfaction is a strong mediating variable, while the work ethic is not able to mediate the effect of Certification and Leadership on teacher performance. Recommendations for implementing Certification, Leadership, and Job Satisfaction to improve teacher performance.