The objective of the study is to determine how organizational ambidexterity influences decision-making effectiveness and to what extent these concepts are applied within the Civil Service Consumer Corporation. It involves two main variables: the independent variable, organizational ambidexterity, which was assessed through three dimensions—exploitation, exploration, and flexibility in organizational structure. The dependent variable, decision-making effectiveness, was also evaluated through three dimensions: problem identification, selecting the best alternative, and decision implementation and follow-up. A questionnaire with 30 items was created to assess these variables, targeting a study population of 120 employees from the General Administration of the Civil Service Consumer Corporation. The researchers utilized a comprehensive enumeration method to distribute the questionnaires, resulting in 110 analyzable responses and a response rate of 92%. A descriptive analytical approach was applied, and various statistical tests were conducted using the SPSS program. The findings revealed several important results, notably that the dimensions of organizational ambidexterity have a statistically significant impact on enhancing decision-making effectiveness. Additionally, these dimensions were found to account for 88.4% of the effectiveness in decision-making. All aspects of organizational ambidexterity were identified as influencing the effectiveness of decision-making, with the flexibility dimension having the most significant explanatory power regarding the organizational structure, while the exploration dimension showed the least. Within the Civil Service Consumer Corporation, both organizational ambidexterity and decision-making effectiveness were found to be at moderate levels. The study suggested implementing a sustainable program to foster innovation, which could include internal competitions and incentive rewards for inventive ideas. A part of the corporation’s budget could be designated to support these initiatives. Additionally, it recommended the formation of either permanent or temporary working groups made up of employees from different departments to analyze challenges and suggest innovative solutions. Moreover, the creation of a dedicated research and development department was proposed to investigate new investment opportunities and enhance existing products and services.