Operational Technology (OT) Cybersecurity Fundamentals is a practical session that introduces the essential concepts of securing critical infrastructure. OT systems power vital sectors such as energy, water, manufacturing, and transportation. As these systems become increasingly connected, cyber risks continue to grow—making OT cybersecurity more critical than ever. This session provides a clear and practical overview of OT security, highlighting the key differences between OT and IT environments, common vulnerabilities in industrial systems, and the real-world consequences of cyberattacks. Participants will explore the OT threat landscape, understand common attack techniques, and gain insights into important standards and frameworks such as IEC 62443 and the Purdue Model. The session also includes real-world case studies to reinforce practical understanding. Outcome: By the end of this session, participants will have a solid foundation in OT cybersecurity and a clear understanding of best practices for protecting critical infrastructure.