Operational technology (OT) cybersecurity breaches are occurring with greater frequency, with ever increasing deadly impacts. For example, a water purification plant system was tempered by hackers recently, causing the addition of a large amount of sodium hydroxide (NaOH) in the water, making it too dangerous for drinking. The security of OT systems has always been a major challenge. As a result, the OT Security Forum invites experts to explore OT security from various aspects.