Purpose: E-government is a means of providing services by facilitating communication between government and citizens, government and businesses and among levels of government in a robust, flexible and efficient manner. Service-Oriented Software Engineering (SOSE) is a recognized approach of developing robust, flexible and efficient E-government system by transformation of existing systems. However, several challenges and issues in SOSE-Based E-government systems need to be addressed to attend

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... e desired goal. This paper used systematic literature review (SLR) to identify, classify and analyze primary studies published in the research community from 2010 to 2021 that focused on SOSE approach for E-government systems. Methodology/Approach: A review protocol was applied to gather 61 relevant primary studies that were critically analyzed, classified and evaluated. Findings/Result: The results shows that research was active on this topic within the reviewed period. The review's record shows that the highest number of publication of 10 was in 2010 and lowest number of publication of 2 was in 2016. Furthermore, interoperability received the highest attention by researchers with 22 publications, whereas security received the lowest attention with 2 publications in the reviewed period. It is recommended that further research be conducted on modelling in view of the heterogeneous and dynamic nature of business operations in governance. In addition, further research is required toward SOSE security for protection of E-government systems. Originality/Value: A new research direction identified on SOSE-Based E-Government System Paper Type: Review Research Paper.