The aim of this study is to examine the influence of Knowledge Management, Emotional Intelligence and Empowerment to Performance either individually or simultaneously. Variables of Knowledge Management, Emotional Intelligence and Empowerment function as independent variables while the dependent variable is Performance. The research was conducted on proportional randomly selected 119 principals of private Islamic Junior High schools in Jambi Province, Indonesia. Using mix method, sequential explanatory design is applied where quantitative comes first. The study both quantitatively and qualitatively reveals that there is a positive significant relationship among variables under the following distribution of coefficient of correlation: Knowledge Management to principal's performance= 0.181, Emotional Intelligence to principal's performance = 0.585, Empowerment to principal's performance = 0.565 and when tested together it produces coefficient of determination = 0.397 indicating the existence of other 60.3 % variables not including in the model affecting principal's performance within the Islamic Junior High schools principals� working environment