The 9th World Congress on Industrial Control Systems Security (WCICSS-2025) is a meeting point for professionals and researchers, IT security professionals, managers, developers, educators, vendors and service providers who are involved in development, integration, assessment, implementation, and operation of industrial cybersecurity technologies. The WCICSS-2025 is an international refereed conference dedicated to the advancement of the theory and practices of Industrial Controls Security and SCADA. Therefore, the conference will provide opportunities to discuss both the current status and emerging trends in protection of industrial control systems.