This paper provides a comprehensive examination of cybersecurity measures within e-government systems in East Africa. It begins with an overview of the importance of cybersecurity in e-government, emphasizing the need to protect sensitive data and ensure the integrity of digital services. The paper then explores key aspects of cybersecurity, including risk assessment and management, data encryption, firewalls, intrusion detection/prevention systems, access control, and security awareness training. Each section highlights the significance of these measures in enhancing the security and resilience of e-government systems. The conclusion underscores the importance of continuous vigilance and investment in cybersecurity technologies to address evolving threats effectively. Overall, this paper serves as a valuable resource for understanding and implementing cybersecurity best practices in East African e-government initiatives. Keywords: Cybersecurity, E-government systems, East Africa, Risk assessment, Data encryption