This causal research is aimed at obtaining information related to possibility whether job performance is affected by employee retention and customer satisfaction. The research was conducted at the PT Indosat by using survey method with correlational applied in testing hypothesis. Fifty participants were selected as samples by boring sampling. The results indicate that task job performance affected directly by customer satisfaction has the greatest influence. Based on the findings it could be concluded that variation of the customer satisfaction might have been affected by the variation of employee retention and customer satisfaction. Therefore, employee retention and customer satisfaction should be put into consideration in developing job performance.
                        
                        
                        
                        
                            
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