Over the past decade, operational technology (OT) systems have become increasingly IP-connected and more vulnerable to cyber threats. As the lines between traditional IT risk management and operational risk management continue to blur, CISOs must incorporate OT cyber risk into their enterprise security strategy.
Key takeaways
• OT risk management requires a different approach from IT security, with safety and availability taking priority over data confidentiality.
• Legacy devices, limited patching windows, and IT/OT convergence create unique vulnerabilities that traditional security tools are not built to address.
• Full asset visibility is the foundation of any effective OT risk management program. You cannot protect what you cannot see.
• Continuous monitoring serves as the critical compensating control when immediate patching is not possible.
• Integrating OT into your enterprise risk management strategy reduces downtime, protects people and the environment, and positions your organization ahead of tightening regulations.
What Is Operational Technology (OT)?
First, let’s define what “operational technology” is. OT encompasses the hardware and/or software that controls or monitors assets operating a process in the physical world. This can include everything from traditional industrial control systems (ICS) to Internet of Things (IoT) devices that are involved in a physical process.
OT vs. ICS vs. SCADA
When most people hear the term “OT”, they associate it with factories and energy grids, and that’s true. But today, you can find operational technology in almost every industry. This concept covers anything is controlling something in the physical world. Things like HVAC systems, escalators, elevators, physical access control mechanisms, drones, cranes, autonomous robots, and more are all considered “OT”.
ICS refers specifically to the systems used to monitor and control industrial processes, while SCADA (Supervisory Control and Data Acquisition) is a type of ICS that remotely monitors and controls industrial equipment, collecting real-time data from remote sensors and equipment. OT is the broader umbrella that encompasses both, along with any other hardware or software interacting with physical processes. Understanding how these terms relate helps CISOs scope their OT risk management programs more precisely and avoid coverage gaps.
Important Nuances to Consider for OT Environments
While an integrated approach delivers advantages, CISOs should be aware of key differences when managing cyber risk in OT environments:
- Legacy devices and proprietary protocols are common in OT, making asset discovery and behavior profiling more difficult. Using data collection methods that were purpose-built for OT systems is the best way to get the asset and network information you need, while ensuring that there is no process disruption.
Many OT devices and controllers also have limited computing power and resources, so choose a lightweight endpoint security solution specifically engineered for this use case.
- Managing software vulnerabilities across a mix of OT platforms and customized applications is a huge challenge. Not only does the volume of OT and IoT devices make them harder to manage than IT devices (billions vs. millions), but patching also can’t be automated like it can in IT systems.
Solutions that can help you prioritize which vulnerabilities to focus on based on the likelihood and impact of a compromise are the most effective way to manage vulnerabilities in OT. Using a traditional IT vulnerability management solution for these environments will not copy/paste well.
- OT systems prioritize safety and availability over confidentiality. Monitoring should focus on recognizing anomalies more than strict policy adherence. OT environments have a combination of real-time processing needs and data historian servers. Monitoring tactics must align to support time-series data as well as steady-state analysis.
How OT Risk Management Differs From IT Risk Management
Effective OT risk management requires a fundamentally different mindset from traditional IT security. In IT environments, security programs are built around the CIA triad — confidentiality, integrity, and availability. Protecting data confidentiality is a primary concern. Systems can also typically be patched or taken offline with minimal operational disruption. In OT environments, availability and safety come first, meaning a security response that takes a system offline can be just as damaging as the attack itself. Asset lifespans in OT often stretch 15 to 30 years, far beyond the typical IT refresh cycle, which means many devices were never designed with modern cybersecurity in mind. This gap makes contextual, OT-specific risk management not just a best practice, but a business necessity.
3 Business Benefits of Integrating OT Into Enterprise Risk Management
Improved visibility, detection and control for OT systems enable CISOs and their teams to manage cyber risk holistically across the enterprise to reduce the risk of unplanned downtime, ensure the safety of people and the environment, and prepare for increasing cybersecurity regulations globally.
1. Reduce Unplanned Downtime in OT Systems
While cyberattacks have traditionally targeted the data inside IT systems, the convergence of IT and OT has raised the stakes. Bad actors now have pathways to disrupt physical processes at manufacturing companies, energy companies and other critical infrastructure providers.
Without the appropriate security controls and monitoring in place, attacks against these systems can have devastating impacts on revenue from service interruptions and/or product defects.
A mature OT risk management program creates structured processes for identifying and addressing those vulnerabilities before they can be exploited, reducing the likelihood of costly, unplanned outages that affect not just revenue but customer trust and operational reputation.
2. Ensure the Safety of Humans and the Environment
In industries like energy and transportation, a cyberattack on OT systems can potentially put lives and/or the environment at risk. When devices controlling, for example an oil rig, a chemical refining process or the travel of a train, fail or are forced into an unsafe state, injuries or environmental damage can occur.
To promote safety, monitoring for changes in operational devices allows security teams to recognize dangerous malfunctions or manipulations and intervene before they create a safety or environmental hazard.
This is why OT risk management frameworks consistently place safety assurance at the top of their priority hierarchy. Unlike IT risk, where consequences are most often financial or reputational, OT risk carries the potential for physical, irreversible harm. Security controls in these environments must account for this reality from the ground up.
3. Future-Proof Cybersecurity Policies for Increasing Regulations
For industries facing increasing regulatory oversight, including energy, critical manufacturing, and transportation, using strong, scalable cybersecurity controls for OT environments will become critical to maintain compliance with standards like NERC CIP, the NIS2 Directive, the SOCI Act and the new SEC Rules on Cybersecurity.
Although most regulations still have gaps in explicitly addressing IoT and OT, that’s expected to change soon as regulators and auditors catch up with the changing digital landscape. Getting ahead of pending regulations now allows for smoother adoption later.
Proactive OT risk management also strengthens an organization's position when pursuing cyber insurance coverage. Insurers are increasingly scrutinizing industrial environments, and organizations that can demonstrate continuous monitoring, documented risk assessments, and structured mitigation programs are better positioned to obtain favorable policy terms.
3 Technical Benefits of Integrating OT Into Enterprise Risk Management
With rapid insight into early stages of device or network anomalies, security teams can take actions to stop malicious software from spreading between IT and OT Infrastructure through linked pathways. Integrating OT assets and networks into existing security monitoring delivers the asset management, threat intelligence and behavioral analytics necessary to prevent or detect cyber incidents before material impacts occur.
1. Unified Asset Management
In industrial environments, OT and IT systems typically maintain separate data sets. OT systems track detailed asset information for production, while IT systems, like maintenance management, track higher-level business data. This separation can hinder effective communication and risk management decision-making between teams.
By blending OT asset data with supplemental IT details, security and operations teams gain a unified view of their vital production assets. This provides essential context for smarter security decisions and fosters better collaboration. The result is improved risk management and more uptime.
Complete asset visibility is the foundation of any OT risk management program. You cannot assess, prioritize, or mitigate risk across assets you have not inventoried. This includes not just PLCs and SCADA systems, but IoT sensors, building management systems, and any other cyber-physical component connected to the network.
2. Early Detection of Threats and Anomalies
Incorporating OT monitoring into SIEMs and analytics tools allows for cross-pollination of threat intelligence. Security teams can more quickly detect compromises or recognize attack patterns spreading from IT to OT or vice versa.
Continuous monitoring also enables earlier intervention and provides a snapshot of what was occurring in the OT network or asset leading up to a security event to facilitate faster response and recovery.
Because patching cannot always be applied immediately without causing downtime, continuous, passive behavioral monitoring fills a critical gap in OT risk management. Detecting anomalies in real time, without disrupting live processes, allows security teams to plan remediation during scheduled maintenance windows rather than reacting to active incidents under pressure.
3. Efficiency Gains in Process and Technology
Companies can maximize their ROI on security tools by feeding data from both IT and OT environments into their existing SIEM, analytics, and monitoring platforms. It allows them to get more value from the technology they already have. Integrating programs on the process side also removes duplicate efforts between IT and OT teams.
Cross-functional collaboration between IT security teams and OT operations staff is a force multiplier for risk reduction. When these teams work from shared data and unified workflows, threat response is faster, communication gaps close, and security investments deliver broader value across the enterprise.
Key Principles of an Effective OT Risk Management Program
A strong OT risk management program is built on a set of core principles that account for the unique constraints and priorities of industrial environments.
- Assume you cannot always patch immediately. Unlike IT, OT patching often requires planned downtime. Risk management strategies must include compensating controls, such as network segmentation and enhanced monitoring, to manage OT risk in the interim.
- Prioritize by consequence, not just likelihood. Not all vulnerabilities carry equal weight. In OT environments, the potential physical or safety impact of a compromise often matters more than its probability, making consequence-based risk scoring essential.
- Build for resilience, not just prevention. A breach or failure may still occur. OT risk management programs should include incident response planning and recovery procedures designed specifically for industrial environments.
- Align IT and OT teams around shared risk visibility. Siloed security programs leave dangerous gaps at the IT/OT boundary. Unified risk reporting and joint governance models improve both detection speed and remediation coordination.
- Treat regulatory readiness as a byproduct of good security, not a separate initiative. Organizations that build comprehensive OT risk management programs will naturally satisfy the requirements of most applicable frameworks, including ISA/IEC 62443, NIST SP 800-82, and NERC CIP.
Taking the Next Step in OT Risk Management
As CISOs look to bolster their security postures across the operational environment, taking an integrated approach to continuous security monitoring that encompasses both IT and OT infrastructures will achieve significant improvements in the enterprise risk management strategy. With improved OT asset visibility and situational awareness across the enterprise, organizations can achieve greater safety assurance, avoid costly disruptions, and stay prepared for the changing global regulatory landscape.
Wherever your organization is in its OT risk management journey, the path forward requires specialized expertise, purpose-built tools, and a long-term commitment to continuous improvement. No two industrial environments are alike, and the most effective security programs are those tailored to the specific assets, processes, and risk profiles of the organization they protect.
Nozomi Networks supports organizations at every stage of this OT journey. Get in touch with the our team to learn how we can help you gain visibility, reduce OT risk, and build a more resilient industrial security program.
OT Risk Management FAQs
IT risk management focuses primarily on protecting data confidentiality, integrity, and availability across digital systems, while OT risk management prioritizes the safety, reliability, and continuity of physical industrial processes. OT environments introduce unique challenges, including legacy devices with long lifespans, limited patching windows, proprietary protocols, and the potential for cyber incidents to cause physical harm or environmental damage. These differences require OT-specific tools, frameworks, and expertise rather than a direct extension of traditional IT security practices.
The most significant OT risks include legacy devices running outdated firmware with no available patches, the expanded attack surface created by IT/OT convergence, insecure remote access connections, and the use of proprietary protocols that traditional security tools cannot interpret. Ransomware targeting industrial environments has also increased significantly, with attackers recognizing that the operational and safety stakes make OT-dependent organizations more likely to pay. Gaining full asset visibility is the first step toward understanding and reducing exposure across all of these risk areas.
A foundational OT risk management program starts with comprehensive asset discovery, followed by vulnerability and threat assessment, consequence-based risk prioritization, and implementation of compensating controls where patching is not immediately possible. Continuous monitoring, cross-functional governance between IT and OT teams, and alignment to frameworks like ISA/IEC 62443 or NIST SP 800-82 round out a mature program. Organizations that are building or expanding their programs can accelerate that process significantly by partnering with specialists who offer OT-specific assessments, deployment support, and managed detection services.
Unlike IT systems, most OT devices cannot be taken offline for updates without interrupting physical processes, which may have safety or production consequences. Many legacy OT devices also lack vendor support for modern patches, and some run proprietary operating systems that standard patch management tools cannot reach. This is why continuous, passive monitoring is so critical in OT risk management: when you cannot patch immediately, real-time anomaly detection becomes the primary compensating control that keeps the environment protected between scheduled maintenance windows.
