Supply chain flexibility is widely seen as one major response to the increasing uncertainty and competition in the marketplace. That is to say a firm with a flexible supply chain is likely to survive and grow its market share. Despite several evidences suggesting that performance improvements are related to SCM, managing supply chains today and practicing flexibility has become more difficult due to the fact that business environments are highly competitive, businesses are going more global, dynamic, and customer‐driven. The purpose of this research is to study the effect of supply chain flexibility (product development flexibility, manufacturing flexibility, logistics flexibility and spanning flexibility) on customer satisfaction of manufacturing firms in Tiret corporate in the perspective of employees. The study was employed through explanatory research design in which selection of respondents were done using stratified proportional sampling technique. A questionnaire was used as a research tool for collecting data. The analysis was made using descriptive for demographic characteristics of the respondents and the significant relationship of the independent variables with the dependent variable was made using inferential statistics (correlation and regression analysis). From the correlation analysis result there were significant positive correlation between all variables (product development flexibility, manufacturing flexibility, logistics flexibility and spanning flexibility) and customer satisfaction at (p<0.01) respectively. Finally, according to the regression analysis result, only the three hypotheses (H2, H3 & H4) which are manufacturing flexibility, logistics flexibility and spanning flexibility has positive and significant influence on customer satisfaction is accepted. This implies that manufacturing flexibility, logistics flexibility and spanning flexibility must be in the best attention of business organizations to take a proactive role in the management of their supply chain in establishing a strong position over its competitors and achieving its goals.