OT Cybersecurity by Design
Navigating the Intersection of Engineering and Cybersecurity
in Modern Power Systems
The global energy sector is currently facing a critical threat situation, prompting a paradigm shift in how power systems are designed and maintained. For decades, the primary focus of power engineering was reliability and safety; however, as the grid becomes increasingly digitized, cybersecurity has evolved from an optional "add-on" to a foundational requirement.
Designing a secure power system is like building a modern hospital. If you wait until the building is finished to decide where the security cameras and biohazard containment systems go, you will have to tear down walls and spend significantly more money. By including the security specialists in the initial blueprints, you ensure that the doctors (the electrical systems) can move quickly and save lives (maintain power) without the security measures getting in their way.
The New Regulatory Reality
This push for enhanced cybersecurity is largely driven by an intensifying global regulatory landscape. In Europe, the NIS2 Directive is setting new benchmarks for critical infrastructure, while Switzerland has introduced specific energy sector regulations to ensure long-term supply resilience. Similarly, in the United States, adherence to NIST standards is becoming a standard requirement for products and installations. For engineering firms, these are no longer abstract guidelines but mandatory client requirements that must be fulfilled to secure tenders and ensure project success.
The "Knowledge Gap": Where IT and OT Clash
Central to this regulatory transition is the need to bridge the gap between the different security approaches in the IoT/IT world and the specialized field of electrical engineering. This discrepancy often leads to technical conflicts.
While cybersecurity standards like IEC 62443 typically recommend network encryption, applying this to real-time power networks can increase latency, potentially delaying the fast-acting protection relays that prevent equipment damage or blackouts. That is why some security measures that are widely used in IT are not directly applicable in OT. In order to still achieve the required level of cybersecurity, suitable compensatory measures must be implemented to limit the risk to the desired level. These must be taken into account at a very early stage in the design phase in order to minimize effort and costs.
The Case for Early Involvement
This necessity for foresight is why cybersecurity specialists must be integrated into the design and construction phase of a project as early as possible. Proactive involvement allows engineers to:
Influence Architecture
Design a network that is "secure by default" rather than trying to secure it after the fact.
Select Appropriate Devices
Ensure that the hardware and software selected support the necessary security protocols from the start.
Reduce Costs
Retrofitting cybersecurity measures into an operational facility is significantly more expensive and complicated than building them in during construction.
The Risk Assessment: A Strategic Roadmap
The primary mechanism for translating this early-stage security DNA into actionable steps is the comprehensive security risk assessment. Rather than being a mere "check-box exercise," a risk assessment serves as a strategic roadmap for identifying which assets are critical and what level of protection is needed (and realistically achievable).
For instance, during a UK substation expansion, a risk assessment identified that older devices could not support the encryption recommended by IEC 62443. Instead of compromising the project and halting the project, engineers documented the risk and implemented compensating controls, such as strict access policies and specialized monitoring. The result was a system that remained functionally safe while acknowledging and mitigating digital threats. By documenting these trade-offs, the engineers provided a path forward that balanced ideal security standards with the hard realities of operational functionality.
Specialized Tools for OT Visibility
While assessments provide the roadmap, maintaining that security posture requires specialized Operational Technology (OT) tools designed for the unique rigors of the power grid. Traditional IT tools often fail to account for the unique protocols and safety requirements of a power grid, which is why solutions like StationGuard are vital for asset inventory, vulnerability management, and intrusion detection:
Asset and Vulnerability Management
Tools like StationGuard GridOps allow operators to view all digital assets in one place and manage vulnerabilities without disrupting power delivery.
➔ Explore the GridOps features
Functional Monitoring and Intrusion Detection
Solutions such as StationGuard Sensor provide functional monitoring, detecting communication errors or cyberattacks by analyzing network traffic specifically within the context of power system protocols.
➔ Explore the Sensor features
These specialized tools ensure that once a system is live, operators maintain the constant visibility needed to uphold the security framework established during the design phase.
Building Long-Term Resilience
However, even with the most advanced tools and designs, true resilience is measured by how a system – and the people who manage it – recover when an incident inevitably occurs. Because it is often a matter of "when" rather than "if," robust incident response plans must include a structured (after-)action process:
Assignment of Responsibilities
Defining who needs to become active in the case of incidents and emergencies and who is responsible for which actions are essential for a smooth and fast line of response.
Quick Response Preparation
Be prepared to respond quickly to security-related incidents. The detection of anomalies and the alerting of incident response or emergency teams should be practiced.
After-Action Debriefs
Following a cyber event, it is vital to conduct a "hot wash-up" to identify lessons-learned and update business continuity plans.
This cycle of reflection ensures that the final step of responding to one incident becomes the first step in preparing for the next, creating a loop of continuous improvement.
A Collaborative Future
As the industry moves decisively toward global standardization and mandatory compliance with frameworks like ISO 27019, building a resilient grid is no longer a solitary task. The trend in the power industry is moving decisively toward standardization and mandatory compliance with international standards like ISO 27019. The most successful projects are those viewed as a "team effort" involving a deep collaboration between clients, engineers, and cybersecurity specialists. By integrating security from day one, documenting risks transparently, and utilizing OT-specific monitoring, the power industry can build a future where supply remains secure and the digital grid remains resilient against evolving threats.
Listen to our Experts
For a practical, real-world perspective on how cybersecurity risk assessments address operational constraints in power system projects, listen to the full podcast episode featuring insights from our Cybersecurity Consultant, Simon Rommer, and Regional Engineering Manager at H&MV Engineering, Jose Paredes.
We Can Support Your Cybersecurity Solutions
Visit the OMICRON Cybersecurity website to explore our cybersecurity offerings and learn how secure-by-design principles can be applied to your power system projects.
