The study aimed to explore the impact of strategic management on organizational performance, while analyzing the mediating role of organizational entrepreneurship. This was conducted through a case study of the Libyan Post, Telecommunications, and Information Technology Holding Company and its subsidiaries. The research problem stems from weak institutional performance within the Libyan telecommunications sector, which results from inadequate application of strategic management and organizational entrepreneurship concepts. The study adopted an analytical descriptive approach and employed a questionnaire as the primary tool for data collection from a study population of 400 individuals, including managers, administrative staff, and department heads. Data was analyzed using SPSS V.25 and AMOS V.24 software. The results revealed a positive correlation between the dimensions of strategic management (preparation, formulation, implementation, and control) and organizational performance, with a correlation coefficient of 86.3%. The study recommended enhancing the application of strategic management within institutions as an effective means to address challenges, intensifying awareness efforts among employees regarding its importance, and ensuring their involvement in formulating and implementing strategic plans, alongside improving internal communication channels. It also emphasized the importance of consulting experts when developing strategies, particularly in a dynamic environment such as the telecommunications sector.