03-41 OT/ICS Cybersecurity Skills - You Can't Secure What You Don't Understand The 4 Essential OTICS Cybersecurity Skills
OT/ICS cybersecurity skills begin with networking, industrial control systems, IT security, and engineering fundamentals. Here's why closing these knowledge gaps is essential to protecting critical operations.
Industrial cybersecurity has a problem that technology alone cannot solve.
Organizations are investing in firewalls, monitoring platforms, intrusion detection, network segmentation, and increasingly sophisticated security tools. Yet many of the people responsible for securing industrial environments may lack a complete understanding of the systems those tools are supposed to protect.
An IT security professional might understand firewalls but know very little about programmable logic controllers.
A control engineer might understand industrial processes but lack experience with TCP/IP, authentication, or network security.
A network administrator might know how to configure switches and routers but not understand why a seemingly routine change could interrupt a manufacturing line.
Individually, these professionals may be highly competent. Together, however, their knowledge gaps can create weaknesses that technology cannot automatically eliminate.
That is the fundamental challenge behind OT/ICS cybersecurity: protecting industrial systems requires an understanding of both digital infrastructure and the physical processes it controls.
And it is becoming more urgent.
Industrial Cybersecurity Is No Longer an Isolated Engineering Problem
Operational technology (OT) refers to systems that monitor, control, or directly affect physical equipment and processes. Industrial control systems (ICS) are a major category of OT, encompassing the equipment and software used in manufacturing, utilities, energy production, transportation, water treatment, and other critical operations.
Historically, many industrial systems operated through specialized, relatively isolated networks.
Today, industrial facilities increasingly rely on Ethernet, TCP/IP, wireless communications, remote access, industrial IoT devices, and connections to enterprise IT infrastructure.
Not every control device uses Ethernet or IP. Legacy serial networks and specialized industrial protocols remain common. But the expanding use of familiar IT networking technologies has increased the overlap between IT and OT.
That creates new operational capabilities—and additional security responsibilities.
In September 2026, the National Institute of Standards and Technology released an updated public draft of its Guide to Operational Technology Security, SP 800-82 Revision 4.
The draft places particular emphasis on protecting OT while maintaining its unique performance, reliability, and safety requirements. Its expanded guidance addresses asset management, network monitoring, industrial IoT, cloud convergence, and security architecture.
NIST
The message for organizations is clear: industrial cybersecurity cannot be treated simply as conventional IT security applied to a factory.
It requires professionals who understand the underlying technologies and their operational consequences.
Four foundational disciplines deserve particular attention.
1. IT Networking: Understand the Infrastructure Before Securing It
Networking is one of the most important—and frequently underestimated—foundations of industrial cybersecurity.
Modern industrial environments may include managed Ethernet switches, routers, fiber connections, wireless access points, industrial gateways, firewalls, and remote-access infrastructure.
Many operate using the same TCP/IP concepts found in corporate networks.
That means security professionals working with OT environments need to understand more than cybersecurity tools.
They need practical networking knowledge.
Consider the following technologies:
IP addresses and subnets: Identify devices, establish network boundaries, and determine which systems can communicate.
Switches and VLANs: Connect devices and help separate traffic into manageable network segments.
Routers: Enable communications between different networks and introduce additional security considerations.
Access control lists: Define which traffic may pass between devices or network segments.
Wired and wireless networking: Support industrial connectivity while introducing different availability, interference, and access risks.
Industrial protocols: Carry monitoring and control communications, sometimes with limited native security protections.
Why does this matter?
Imagine a manufacturing facility where production equipment communicates through several network segments.
An engineer changes a subnet configuration without understanding the dependencies between controllers, operator workstations, and supervisory systems.
The result may not simply be a temporary loss of internet connectivity.
It could prevent operators from viewing process data, interrupt legitimate controller communications, or affect production availability.
Likewise, a security administrator might deploy an access control list that appears reasonable from an IT perspective but blocks essential industrial traffic.
Effective segmentation requires understanding both the network and the process.
OT/ICS Cybersecurity Skills - Professionals developing these competencies can start with Chauster's Computer Networking Career Path, which covers foundational and advanced skills across TCP/IP, routing, switching, wireless networking, network security, and enterprise architecture.
Certifications such as CompTIA Network+ and Cisco CCNA can provide a structured foundation before professionals move into more specialized industrial networking and OT security responsibilities.
The principle is straightforward.
You cannot design effective network security controls if you do not understand how the network operates.
2. PLC and Industrial Asset Basics: Know the Equipment You're Protecting
One of the biggest misconceptions about industrial environments is that they consist entirely of specialized controllers and proprietary hardware.
In reality, many industrial facilities also rely heavily on conventional IT systems.
Windows-based engineering workstations, human-machine interfaces, application servers, historians, supervisory systems, and remote-access platforms frequently support industrial operations.
These systems coexist with specialized operational equipment that many traditional IT professionals have never encountered.
Understanding the differences is essential.
Programmable Logic Controllers (PLCs)
PLCs are industrial computers designed to automate machinery and processes.
They receive information from sensors, evaluate control logic, and send instructions to equipment such as motors, pumps, valves, and actuators.
A PLC might control a conveyor belt, regulate liquid levels, or coordinate manufacturing equipment.
Remote Terminal Units (RTUs)
RTUs collect data and support remote monitoring or control, often in geographically distributed environments.
They are common in electric utilities, water systems, pipelines, and other operations where equipment is spread across large distances.
Distributed Control Systems (DCS)
DCS platforms coordinate and regulate complex industrial processes, particularly in process-intensive environments such as chemical production, refining, and power generation.
They typically support distributed controllers, integrated operations, and continuous process management.
Supervisory Control and Data Acquisition (SCADA)
SCADA systems provide supervisory monitoring and control across industrial operations.
They collect operational data, present information to operators, manage alarms, and may issue supervisory commands to field equipment.
SCADA is generally a system architecture rather than a single piece of equipment.
These technologies have different responsibilities, but they are often interconnected.
A Windows-based engineering workstation might be used to configure a PLC. An HMI might display readings collected from field equipment. A SCADA platform might monitor a network of RTUs.
If an organization does not understand those relationships, it may struggle to identify which assets are most critical—or what would happen if one were compromised.
That is why asset inventories are so important.
It is not enough to know that a device exists.
Organizations need to understand what it does, what it communicates with, how it is administered, and which physical processes depend on it.
NIST's OT security guidance emphasizes asset management and the relationship between digital systems and physical operations.
CSRC
The workforce-development implication
Not every cybersecurity professional needs to become a PLC programmer.
However, security personnel should understand enough about industrial devices to communicate effectively with control engineers, evaluate operational dependencies, and recognize the risks associated with proposed security actions.
Similarly, industrial engineers benefit from understanding Windows administration, networking, access controls, and common IT cybersecurity practices.
Chauster's Cybersecurity Training Solutions can help organizations establish these transferable technical foundations, complemented by industrial automation and process-specific instruction from qualified OT specialists.
The objective is cross-disciplinary competence, not replacing engineering expertise with cybersecurity certifications.
3. IT Cybersecurity: Master the Fundamentals Before Adapting Them to OT
IT and OT security are not identical.
But they share many of the same fundamental principles.
Both require asset visibility, access control, secure configuration, network protection, incident response, and risk management.
Both must account for malicious activity, unauthorized access, compromised credentials, vulnerable software, and insecure remote connections.
And both depend on people who understand how defensive controls operate.
That makes traditional IT cybersecurity education a valuable starting point for industrial cybersecurity professionals.
Core competencies include security policies, firewalls, encryption, authentication, identity and access management, logging, vulnerability management, and authorized security testing.
However, those principles cannot always be transferred without modification.
Consider vulnerability scanning.
In a conventional IT environment, an organization may routinely scan endpoints and servers for security weaknesses.
In an industrial environment, aggressive or poorly planned scans can affect sensitive equipment, legacy devices, or communications.
A similar concern applies to patch management.
An IT administrator may prioritize installing an urgent security update quickly.
A control engineer may have to consider vendor compatibility, validated configurations, scheduled maintenance windows, and whether the update could affect a safety-critical process.
Even incident response can be different.
Isolating a suspicious workstation may be straightforward in an office. Isolating a system that supports industrial monitoring or control may require coordination with operations personnel to prevent additional harm.
The goal is not to abandon established cybersecurity principles.
It is to apply them intelligently.
Where cybersecurity training fits
Chauster's Cybersecurity Professional Development Program provides an avenue for developing broader security capabilities.
Foundational programs and certifications can help professionals gain experience with security architecture, identity management, threat detection, incident response, and governance before progressing into OT-specific specialization.
The Cybersecurity Solutions and Certification Pathways also includes options spanning CompTIA Security+, CySA+, advanced security engineering, and specialized security operations training.
For organizations, these learning opportunities can support structured development across the workforce rather than assuming that a general cybersecurity credential automatically establishes OT expertise.
The right approach is to master the underlying security principles, then learn how industrial requirements change their implementation.
4. Engineering Concepts: Understand What Happens in the Physical World
The fourth pillar may be the most important distinction between industrial cybersecurity and traditional information security.
Industrial systems do not simply store, process, and transmit information.
They operate physical equipment.
They regulate pressure, temperature, flow, voltage, speed, and chemical processes.
They may control systems where unintended behavior can affect equipment, production, the environment, or human safety.
A cybersecurity professional who does not understand those physical consequences may overlook risks that are obvious to a process engineer.
Consider a water treatment facility.
A PLC may regulate pumps and valves based on readings from level and pressure sensors.
An operator workstation may display those readings and allow authorized supervisory adjustments.
A cybersecurity incident could affect the integrity of those readings, the availability of supervisory controls, or the ability of operators to observe what is happening.
Understanding the network is necessary.
Understanding the controller is important.
But understanding the physical process is what allows the team to evaluate the actual operational consequences.
This requires familiarity with concepts such as sensors and actuators, feedback control loops, process variables, safety interlocks, fail-safe behavior, operating tolerances, and industrial maintenance practices.
It also requires recognizing that cybersecurity systems and independent safety systems serve different purposes.
Cybersecurity controls help prevent, detect, and respond to digital threats. Engineering safeguards help maintain safe physical operations, including when digital systems fail.
Neither substitutes for the other.
Effective OT risk management requires coordination between cybersecurity personnel, network engineers, automation specialists, operations teams, and safety professionals.
That coordination must be developed deliberately.
The Real OT/ICS Cybersecurity Skills Gap Is Between Disciplines
Organizations often discuss cybersecurity workforce shortages in terms of hiring more specialists.
However, industrial cybersecurity creates an additional challenge.
The organization may already employ talented network engineers, cybersecurity analysts, Windows administrators, automation engineers, and plant operators.
What may be missing is the knowledge required to work effectively across those disciplines.
A cybersecurity analyst might understand the threat but not the production process.
An operations engineer might understand the process but not the attack path.
A network engineer might recognize abnormal traffic but not know whether it represents an urgent operational threat.
Those gaps can delay decisions, complicate incident response, and undermine security investments.
In many cases, the most immediate solution is not to hire an entirely new team.
It is to develop the capabilities of the people already responsible for critical operations.
That starts with evaluating actual proficiency instead of relying exclusively on job titles, seniority, or certifications.
How Organizations Can Build an OT-Ready Workforce
A practical workforce-development strategy should begin with a structured skills assessment.
Skills area | What teams should demonstrate |
IT Networking | Explain IP communication, routing, switching, segmentation, and industrial traffic dependencies |
OT Assets | Identify PLCs, RTUs, DCS, SCADA, Windows-based OT systems, and their operational roles |
IT Cybersecurity | Understand access controls, security architecture, vulnerability management, monitoring, and incident response |
Engineering | Explain basic control processes, operational dependencies, reliability constraints, and safety implications |
The assessment should reveal where knowledge is strong, where employees need training, and where cross-functional collaboration needs improvement.
From there, organizations can take several practical actions.
First, establish a common technical foundation. Provide networking and cybersecurity fundamentals to employees who need them, while introducing IT personnel to industrial equipment and processes.
Second, build role-specific learning pathways. Network engineers, cybersecurity analysts, control engineers, and operations managers do not all need identical training. They need complementary capabilities appropriate to their responsibilities.
Third, use practical exercises. Controlled labs, tabletop scenarios, network diagrams, simulated incidents, and supervised industrial training environments can help teams connect theory with operational decisions.
Fourth, align certifications with actual responsibilities. Network+, CCNA, Security+, CySA+, CISSP, and other credentials can validate valuable skills, but none should be mistaken for complete preparation to secure every OT environment.
Finally, measure whether training improves performance. Employees should be able to explain system relationships, identify risks, collaborate across departments, and make better-informed decisions.
Chauster supports this structured approach through its Technology Career Paths, certification-oriented learning resources, and professional development solutions.
The value is not simply access to more training.
It is the ability to connect training to specific responsibilities and measurable capability gaps.
The Best Industrial Cybersecurity Investment May Be a Better-Trained Workforce
Industrial cybersecurity will continue to evolve.
Organizations will adopt additional connected equipment, remote-access capabilities, automation, monitoring systems, and digital technologies.
Security platforms will become more sophisticated.
But technology will not eliminate the need for technical understanding.
A firewall cannot independently determine every operational dependency.
An asset inventory cannot replace knowledge of physical processes.
A cybersecurity certification cannot substitute for years of specialized control engineering experience.
And a sophisticated monitoring platform cannot guarantee that the people responding to an alert understand the consequences of their decisions.
The strongest industrial cybersecurity programs are built on both reliable technology and capable people.
They recognize that networking, IT cybersecurity, industrial automation, and engineering are not isolated fields when it comes to protecting critical operations.
They are interconnected foundations.
For organizations evaluating their industrial cybersecurity readiness, the first question should not always be which security product to purchase next.
It should be whether the workforce understands the systems it is expected to protect.
Through its networking, cybersecurity, certification, and professional development resources, Chauster helps organizations strengthen essential technical capabilities and build more effective workforce learning pathways.
Because ultimately, you cannot secure what you do not understand—and understanding begins with the right education.
About Steve Chau
Steve Chau is an entrepreneur, marketing strategist, and technology education executive with more than 35 years of experience spanning technology, cybersecurity, financial services, and hospitality. A graduate of Virginia Tech, he has held leadership and business development roles with organizations including HSBC, AIG, First Tennessee Bank, and (ISC)² before founding TechEd360 Inc. and Chauster Inc., where he leads workforce development and IT certification initiatives for professionals, government agencies, and enterprise organizations. Recognized for his expertise in sales, marketing, business development, and underserved market strategy, Steve combines entrepreneurial insight with deep industry knowledge to help individuals and organizations build the skills needed to succeed in today's rapidly evolving digital economy. He regularly writes and speaks on artificial intelligence, cybersecurity, technology, workforce development, and business strategy.
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