Abstract:This study aimed to develop and to validate a Strategic Information Systems Planning (SISP) model designed to improve the information flow performance by incorporating the antecedent factors into information technology components, information needs and security of information flow factors. The methodology was carried out in four phases; the theoretical study, the conceptual framework design, the survey design, the data analysis, and the model development and validation phase. Questionnaires were distributed to 350 employees at the Ministry of Higher Education and Scientific Research (MoHESR) and four (4) government universities in Yemen for data collection. Based on the correlation results, it was found that information technology components have significant relationship with information needs. Moreover, information technology components have a direct significant relationship with the security of information flow in the MoHESR and universities in Yemen and they have indirect influence through the information technology components on the security of information flow in the MoHESR and universities in Yemen. By adopting the Structural Equation Modelling (SEM) analysis using AMOS, the results indicated that all the fit indices satisfied the recommended range of value. This implies that the model developed was acceptable. The validation results also revealed that the entire model fitness was appropriate and evidence of the stability of the conceptual framework used in this study.