The determination of this study was to inspect the role of High Performance Work Practices (HPWPs) on organizational performance in four major telecom players in Pakistan. This study evaluates the impact of high performance work practices (for example; training, empowerment, reward, recruitment & selection and job security) on organizational performance. This study also determined the mediating effect of job satisfaction in the association between high performance work practices (HPWPs) and organizational performance. Data was collected through a structured questionnaire from 253 permanent employees of telecom companies operating in Islamabad, Pakistan. Data was analyzed in SPSS and AMOS. The findings of the study showed that HPWP regard to training, empowerment and reward significantly influenced organizational performance. The results also showed that job satisfaction mediates the relationship between HPWPs and organizational performance. This study further endorses the need for focusing on HPWPs. Supervisor:- Dr Hassan Rasool