Risk Management for Operational Technology (OT) Systems highlights the importance of applying risk assessments specifically tailored to OT environments, rather than relying solely on traditional IT-focused approaches.Conventional IT and enterprise risk management methods often fail to adequately address OT systems-despite their critical role in sustaining and maintaining the operational status of essential infrastructure. As such, OT environments demand greater attention and specialized frameworks. Historically, industries such as petrochemical refining and nuclear power generation have implemented comprehensive safety and risk assessments, covering every aspect of operations. These rigorous processes, refined over decades, have proven highly effective in ensuring safe, stable, and optimized production. OT computing systems within these facilities were traditionally isolated from corporate IT networks, making their performance and risk profile well-understood and reliably managed through engineered specifications.However, the situation has changed. Modern requirements for integration, interoperability, and remote accessibility mean that formerly isolated OT systems are now increasingly interconnected with IT networks and, in many cases, the wider Internet. This connectivity introduces new vulnerabilities, exposing once-secure operational systems to external threats and sophisticated adversaries.The authors propose a modern approach to risk management in OT, one that recognizes these new realities. This approach emphasizes proactive measures to operationally protect legacy and modern OT systems alike from tampering, intrusion, and cyberattack-ensuring that critical infrastructure can remain resilient, safe, and reliable in a connected world.