The main objective of this study is to investigate the Relationship between Human Resources Management Practices (HRMP) and Job Engagement with mediating role of Psychological Capital (PsyCap )in Telecommunications companies in Jordan (Zain, Orange, Umniah). A total of (270) questionnaires have been sent out to the top and middle management of Jordanian telecom companies in Amman (Zain, Orange, Umniah), The number of questionnaires analyzed are 261, the percentege is (96.7%). The results showed that There is an impact of the dimensions (Jobs analysis and description, Selection and recruitment, Training, Performance appraisal) on Job Engagement and Psychological Capital.Also The results have been proven an impact of Psychological Capital on Job Engagement and There is a partial impact of the Psychological Capital, that is, there is an impact at the level (0.05) of Human Resources Management Practices through the moderator variable (Psychological Capital).