The study aimed to analyze the impact of implementing electronic management systems on the effectiveness of decision-making within public institutions, through a case study of the Brega Petroleum Marketing Company. The importance of the study stems from the urgent need to keep pace with the digital transformation in the workplace and the extent to which it contributes to improving the quality of administrative decisions and enhancing the efficiency of institutional performance. The study followed a descriptive-analytical approach, relying on a case study. Data were collected using quantitative and qualitative research tools, including questionnaires, direct observation, and a review of previous relevant literature. Data were analyzed using appropriate statistical methods to test hypotheses. The results showed a statistically significant positive relationship between the implementation of electronic management systems and the effectiveness of decision-making within the company. It also demonstrated that the quality of electronic information (in terms of accuracy, relevance, timeliness, and sufficiency) plays a crucial role in supporting decision-makers at various administrative levels. The study confirmed disparities in the availability of technical capabilities across departments, as well as disparities in awareness and knowledge of using these systems, which impacts the full utilization of their potential. In light of the findings, the study recommended strengthening the company's digital infrastructure, intensifying employee training programs on the efficient use of electronic management systems, and developing databases to ensure a rapid and accurate flow of information to support decision-making. It also called for the development of unified policies for information management and periodic evaluation of electronic performance to achieve continuous improvement. Keywords: e-management, decision-making, information systems, information quality, digital transformation, corporate performance