Training and development of employees and job satisfaction of employees are two crucial components for the performance of employee. In this study the influence of training and development on employee performance through job satisfaction is studied. 115 questionnaires were distributed among employees i.e. executives and managers of Telecom companies in Abbottabad, Haripur and Mansehra of which 105 were returned. Convenience sampling technique was used for data collection. The response rate was 91%. The finding of our study showed positive impact of training and development and job satisfaction with employee performance. Training and development will lead to higher job satisfaction level in employees and they will fulfill their duties with a great deal of responsibility with best performance.