This study intends to analyze the impact of Technology, Work Procedures, and Personal Knowledge on Employee Performance. This research is based on the notion of knowledge management system (KMS) which is increasingly important for an organization. The object of the research is the employee of PT Bank Central Asia.. Data collection method used was a questionnaire distributed to respondents reseacrh which is based on indicators that represent each variable. The analysis method used in this study show that, (1) Technology negative and significant effect on the performance employee, (2) Job procedure positive and significant impact on performance employee, (3) Personal knowledge positive and significant effect on the performance employee, and (4) Technology, Job procedure, Personal knowledge, together positive and significant impact on employee performance. Based on the research that has been done, the suggestions in this study is that in further research using more than 1 (one) object of study as a comparison Knowledge Management System, particularly related to the performance of the system at a banking industry.