This study was conducted to investigate the effect of organizational silence on organizational citizenship behavior with the moderating role of type of employment in the labor and supply company of the Social Security Organization. The present study is a descriptive correlational descriptive and applied based on purpose. The population of the study consisted of 200 managers, senior experts and staff experts of the company. According to Morgan table, 132 people were selected. In this research, using structural equation modeling, the relationships between variables are investigated. Regarding the moderator of the type of employment, the results showed that there is a significant difference between the mean of organizational citizenship behavior and the dimensions of organizational silence and the type of employment at 5% probability level. Type of employment has no moderating role in the relationship between organizational citizenship behavior and submissive organizational silence.. The mean score of organizational citizenship behavior is lower in the type of contractual employment, so it can be concluded that the type of employment has a moderating role in the relationship between organizational citizenship behavior and defensive organizational silence. In addition, there is a significant difference between the mean organizational citizenship behavior and organizational silence at the 5% probability level, so it can be concluded that the type of employment has no moderating role in relation to organizational citizenship behavior and organizational silence.
