The interoperability of information systems for public organizations is a significant opportunity for improved delivery of e-government services. However, the lack of e-government services integration is one of the issues preventing services from effectively reaching citizens in many developing nations, especially in this era of information technology advancement. Consequently, this paper aims to provide background information and a framework for comprehending the relevance of Tanzania's integration of e-government services. To understand the current state of the art and the prospects for system integration in government procedures, a thorough government institution Information Systems analysis was done to understand the magnitude of the problem. The survey revealed that the absence of electronic data exchange between public information systems leads to information system silos, which hinder efficiency and synergy in the provision of electronic services. A framework for e-government service integration is proposed utilizing a design science research approach to explain the possibilities of service integration in the public sector. The framework suggests harmonizing public institutions in e-government project plans, communicating e-government systems through a unified network, and establishing the e-government service catalog.