The purpose of this research was determine the effect of leadership and organizational commitment on employee performance with work discipline as a mediating variable. The population used in this research were all employees of PT. Sumber Graha Sejahtera, Banyumas Branch. The sample of this research were 110 respondents using non-representative incidental sampling technique. The analysis used was the Model Fit Test (F), t test, Sobel Test, and Determination Coefficient Test (R2).
Based on the results of the fit test model (F) models 1 and 2 have met the model fit test. The results of the t test research concluded; a) leadership affects work discipline, b) organizational commitment has no effect on work discipline, c) work discipline affects employee performance, d) leadership affects employee performance, e) organizational commitment has no effect on employee performance. The Sobel test results concluded that work discipline can mediate the relationship between leadership on employee performance and work discipline cannot mediate the relationship between organizational commitment to employee performance. The result of the coefficient of determination (R2) model 1 shows the magnitude of the influence of leadership, organizational commitment, and work discipline on employee performance by 12.4%. In the coefficient of determination (R2) model 2 test shows that the influence of leadership and organizational commitment to work discipline is 15,9%.