This session will explain how Open Source Intelligence (OSINT) can be leveraged in OT security, as well as the increasing importance of it. Due to more widespread information sharing and AI, previously low level threat actors such as Hacktivists now pose a significant threat to OT, however, many of these groups are not secretive and rather post their TTPs, objectives, and targets on social media such as Telegram, Twitter (formerly X), and Facebook. By leveraging OSINT, security stakeholders can gain insight into these emerging threats. OSINT also plays a critical role in the physical security of critical infrastructure, and may be used to identify would be threats. All of the methods I will discuss in my session are completely free and can be done by anyone with a computer and the internet, making this easily accessible to large scale and small scale OT operations. In my experience as an intelligence analyst, I have observed groups who could wreak havoc to OT systems, and post much of their information online to brag or promote a message. OSINT seems to be a widely overlooked resource as it may seem basic at first due to its ease to attain, however its mastery is where security teams can truly shine.