Replacement in organization’s employees can results in knowledge loss and turnover faces a serious problem in knowledge based organizations such as knowledge based sectors of governmental organizations. The increases in sizes of some governmental organizations in recent years have increased their structural and contextual dimensions. One of the biggest problems in governmental organizations is employee turnover, which could result to knowledge loss. By using knowledge management it is possible to decrease this phenomenon. This survey identifies the effective factors in implementation of knowledge management system as a solution for preventing knowledge loss. By far this study is the first of its kind in the context of information technology sectors of governmental organizations of ARAK Province of Iran.