S4 Events, also known as S4xEvents, is a prominent organizer of specialized conferences and events dedicated to cybersecurity in industrial control systems (ICS) and operational technology (OT) sectors. Established as a key platform for professionals in critical infrastructure protection, S4 Events hosts the annual S4 conference, which brings together experts, policymakers, and industry leaders to discuss emerging threats, best practices, and innovations in securing industrial environments such as energy, manufacturing, and utilities. The events emphasize practical demonstrations, research presentations, and networking opportunities, fostering collaboration to mitigate cyber risks in OT environments. Over the years, S4 has become a cornerstone event in the ICS/OT cybersecurity community, attracting global participation and influencing standards and policies in the field.

Founded in response to growing concerns over cyber vulnerabilities in industrial systems, S4 Events has expanded its portfolio to include training workshops, executive summits, and regional gatherings. The organization is closely affiliated with Digital Bond, a cybersecurity firm specializing in ICS/OT security, which provides the operational backbone for these events. S4 Events prioritizes high-quality, invitation-only or selective attendance to ensure focused discussions on sensitive topics like SCADA systems, PLC security, and incident response. Its contributions have been recognized in advancing awareness and resilience against nation-state threats and ransomware targeting critical infrastructure.

Through its events, S4 Events plays a pivotal role in shaping the discourse on OT cybersecurity, often featuring keynote speakers from government agencies, Fortune 500 companies, and research institutions. The organization's commitment to non-commercial, knowledge-driven content distinguishes it from broader cybersecurity conferences, making it an essential hub for influence networks in industrial security.