The primary objective of this study is to investigate the relationship between Human Resources Management Practices (HRMP) and Job Engagement with mediating role of Psycho-logical Capital (PsyCap) in Telecommunications companies in Jordan (Zain, Orange, Umniah). The researcher relied on descriptive analytical method to analyze and classify the data to achieve the objectives of the study and to identify the variables of the study. A total of (270) questionnaires are sent out to the top and middle management of Jordanian telecom companies in Amman (Zain, Orange, Umniah), 9 questionnaires are excluded, as they were not valid for statistical analysis. The number of questionnaires analyzed are 261 (96.7%). The results showed that there was an impact of the dimensions (Jobs analysis and description, Selection and recruitment, Training, Performance appraisal) on Job Engagement and Psychological Capital. Also, the results indicate an impact of Psychological Capital on Job Engagement and there is a partial impact of the Psychological Capital, that is, there is an impact of Human Resources Management Practices through the moderator variable (Psychological Capital).