Best certifications
Cybersecurity certifications for industrial and OT professionals
From Security+ and CISSP to GICSP and ISA/IEC 62443 certificates: which credentials suit engineers who secure control systems.
Industrial plants are increasingly connected, and operational technology (OT) security has become a core skill. But most cybersecurity certifications were designed for IT. This guide explains general and OT-specific credentials and how they fit together.
How this list was made. This is an editorial shortlist of established certifications described from their issuers’ public information. We do not rank them, and fees, formats and requirements change. Confirm details with the issuer before applying.
Why OT is different
The ISA notes that Industrial control systems were not built with today’s threat landscape in mind.5 Many facilities are running equipment that has been in place for decades, layered with newer technologies and connected in ways no one originally planned.5 Safety and availability come first, and patching or scanning can disrupt processes.
General security credentials
CompTIA Security+ is a globally recognized cybersecurity certification that helps you build and validate the practical cybersecurity skills needed to perform core security functions and pursue a career in cybersecurity.1 CompTIA notes that Security+ V7 is available today, while the newest version, Security+ V8, is expected to launch on or around November 17, 2026.1 For experienced professionals, ISC2 says Earning the CISSP proves you have what it takes to effectively design, implement and manage a best-in-class cybersecurity program.2 ISACA's CISA suits audit and assurance roles.
OT-specific credentials
The Global Industrial Cyber Security Professional (GICSP®) certification validates a practitioner’s capability to achieve security throughout the industrial control systems lifecycle4. GICSP® is a vendor-neutral, practitioner-focused certification4. The ISA offers a programme built on the standard: The ISA/IEC 62443 Cybersecurity Certificate Program is grounded in the ISA/IEC 62443 standards, developed and maintained by ISA.5 IEC 62443 is a series of standards that address security for operational technology in automation and control systems.6
Building a path
- Engineers new to security: start with core skills (e.g. Security+), then OT-specific training.
- IT security professionals moving into OT: learn control systems and IEC 62443.
- Leaders: CISSP plus OT standards knowledge.
General security credentials
CISSP (Certified Information Systems Security Professional) is an independent information security certification granted by the International Information System Security Certification Consortium, also known as ISC2.7 In June 2004, the CISSP designation was accredited under the ANSI ISO/IEC Standard 17024:2003.7 It is broad and management-oriented, and requires experience.
The Computing Technology Industry Association, more commonly known as CompTIA, is a for-profit American trade association that issues vendor-neutral professional certifications for the information technology (IT) industry.8 Its entry-level security credential is a common starting point for people new to security.
GIAC provides a set of vendor-neutral computer security certifications linked to the training courses provided by the SANS.9 GIAC includes industrial control system certifications aimed at OT practitioners.
Why OT needs specific skills
IEC 62443 is a series of standards that address security for operational technology in automation and control systems.6 In OT, availability and safety usually come first, systems run for many years, patching can require planned shutdowns, and protocols were often designed without security. Practitioners need to understand control systems, process safety and the operational constraints of plants, not only IT security.
Building a skill matrix
| Role | Foundations | OT-specific |
|---|---|---|
| Control engineer moving into security | Networking and security fundamentals | IEC 62443 training, ICS security certification |
| IT security analyst moving into OT | Existing security credentials | Control systems fundamentals, industrial protocols, plant safety |
| Security manager | Broad management-level credential | IEC 62443 risk assessment and programme management |
| Integrator or vendor engineer | Security fundamentals | Secure development and product requirements in IEC 62443 |
Hands-on practice
Certifications should be paired with practice. Lab environments with real controllers, network monitoring tools and simulated processes let people learn safely. Never test on production systems without authorisation and safety controls.
Choosing training
- Check that content covers industrial protocols, architectures and safety, not just IT topics renamed.
- Ask about labs with real or emulated industrial equipment.
- Check instructor background in plant operations or control systems.
- Confirm accreditation of the certification and recertification rules.
- Match to the standard your customers or regulators reference.
Organisational competence
Security in plants needs cooperation between IT, engineering, operations and safety. Joint exercises, shared incident response plans and clear ownership of OT assets often matter more than any individual certificate. Train operators to recognise and report unusual behaviour.
The IEC 62443 framework in training
Training around IEC 624436 often follows its structure: general concepts, policies and procedures for asset owners, system requirements for integrators, and component requirements for product suppliers. A good course explains zones and conduits, security levels and the shared responsibilities between owner, integrator and supplier. Ask which parts of the series a course covers so it matches your role.
Experience requirements
Many advanced credentials need documented work experience. CISSP, for example, is held widely: As of December 2025, there were 191,036 ISC2 members holding the CISSP certification worldwide.7 Entry routes exist for those still gaining experience. Plan the sequence so that study supports work you are actually doing.
A practical learning path
- Fundamentals: networking, operating systems, basic security concepts.
- Control systems: PLCs, SCADA, historians, safety instrumented systems and their roles in the plant.
- Industrial protocols: how common protocols work and why many lack authentication.
- Architecture: segmentation, remote access, demilitarised zones between IT and OT.
- Detection and response: passive monitoring, asset inventory, incident response with operations.
- Risk and governance: risk assessment, policies, supplier requirements.
Training non-specialists
Operators, maintenance technicians and engineers need short awareness training: removable media rules, remote access procedures, recognising phishing and reporting unusual HMI behaviour. Tailor examples to the plant; generic office security training does not resonate on the shop floor.
Measuring progress
- Coverage of required training by role.
- Results of tabletop exercises with operations.
- Time to detect and respond in drills.
- Findings closed from assessments against the standard.
Budgeting realistically
Costs include courses, exam fees, lab equipment, travel and time away from operations, plus annual maintenance fees and continuing education for many credentials. Check current prices directly with issuers, since they change. A smaller number of well-chosen certifications, plus a shared lab and regular exercises, usually gives more capability than funding everyone for multiple exams.
Linking training to the plant risk assessment
Use the results of the site security risk assessment to set priorities. If remote access is the biggest gap, train the people who approve and support remote sessions first. If asset inventory is missing, train engineers on passive discovery tools. Training then closes real risks rather than following a generic catalogue.
Key takeaways
- OT security combines IT security with engineering and safety.
- GICSP and ISA/IEC 62443 programmes target industrial roles.
- Combine certifications with hands-on lab practice.
Frequently asked questions
Which certification is best for OT?
For OT practitioners, GICSP and ISA/IEC 62443 programmes are specifically designed; general credentials add breadth.
Do I need IT experience first?
It helps. Many OT professionals combine engineering background with security training.
Is this list complete?
No. Vendor and national schemes also exist.
Is CISSP enough for OT security?
It provides a broad base, but OT roles also need control system and IEC 62443 knowledge.
Where should a control engineer start?
With networking and security fundamentals, then IEC 62443 and an ICS-specific certification.
Do vendors offer OT security training?
Yes, many automation vendors train on securing their own products. It complements vendor-neutral credentials.
Is there a certification for products?
IEC 62443 includes requirements for components and development processes, and certification schemes for products and suppliers exist.
Sources
Every factual statement marked with a number links to the source below. Sources were retrieved on 23 October 2026; check the publisher for later revisions.
- CompTIA Security+ comptia.org
- ISC2 CISSP isc2.org
- ISACA CISA isaca.org
- GIAC GICSP giac.org
- ISA/IEC 62443 certificate programme isa.org
- IEC 62443 (Wikipedia) en.wikipedia.org
- Certified Information Systems Security Professional (Wikipedia) en.wikipedia.org
- CompTIA (Wikipedia) en.wikipedia.org
- Global Information Assurance Certification (Wikipedia) en.wikipedia.org
