CompTIA SecOT+ & GICSP | ICS & OT Security Masterclass 2026

This course contains the use of artificial intelligence.Operational Technology is no longer isolated from cybersecurity risk. Industrial environments now depend on connected systems, remote access, vendor support, cloud integrations, engineering workstations, historians, wireless field communications, and complex IT-OT interfaces. At the same time, these environments must protect safety, reliability, production, and critical infrastructure operations.This course is a practical, structured, and real-world focused masterclass designed to help cybersecurity professionals, engineers, consultants, auditors, SOC analysts, risk professionals, and managers understand how OT and industrial cybersecurity work in real environments.Unlike traditional IT security courses, this course does not treat industrial systems as normal servers or endpoints. You will learn how OT security decisions must consider safety, process stability, engineering constraints, maintenance windows, vendor dependencies, legacy systems, physical access, and operational continuity.You will start by building a strong foundation in OT and ICS concepts, including the difference between OT and IT, ICS building blocks, PLCs, RTUs, DCS, SIS, HMIs, historians, engineering workstations, field devices, Purdue/PERA levels, control theory basics, industrial safety essentials, and the role of engineering systems as the real control plane.From there, you will learn how to design an OT security program using ISA/IEC 62443 principles. The course explains zones and conduits, risk-based segmentation, security levels, policies, minimum baselines, procurement requirements, vendor contracts, supply chain risk, identity, shared credentials, MFA, break-glass access, physical security, threat actors, historical OT incidents, MITRE ATT&CK for ICS, and OT risk assessment.The course then moves into real industrial architecture and sector knowledge, with a deep dive into energy OT environments, including utilities, transmission, distribution, substations, IEDs, SAS architecture, power plants, DCS, SIS, turbine control, balance of plant, OEM realities, and energy-related standards and regulations.You will also learn how OT protocols behave differently from traditional IT traffic. The course covers IEC 61850, GOOSE, MMS, Sampled Values, IEC 60870-5-101/104, Modbus, DNP3, PROFINET, EtherNet/IP, protocol abuse patterns, defensive monitoring, firewall placement, OT DMZ design, jump hosts, remote access gateways, protocol-aware monitoring, inline blocking considerations, wireless OT, private LTE, radio links, field communication risks, historians, data lakes, remote operations, cloud interfaces, and API exposure.A major part of the course focuses on OT security operations and monitoring. You will learn how to perform OT SOC triage with process context, manage assets and configurations, handle vulnerability and patch management in maintenance-window-driven environments, use IDS/IPS and SIEM for OT visibility, manage backups and recovery for PLC logic, configurations, firmware, and golden images, build ICS disaster recovery and business continuity plans, harden OT endpoints, secure Windows systems in OT, protect HMIs, EWS, historians, and domain controllers, and monitor secure remote access.You will also learn how OT incident response differs from traditional IT incident response. The course uses the principle of safety first, stability second, and evidence third. You will explore containment playbooks, segmentation tightening, access kill-switches, controlled shutdown, OT forensics, ransomware decision-making, incident response scenarios, post-incident hardening, and the implementation of OT SOC capabilities.The course also includes a broad view of OT risk management, regulatory mapping, and sector-specific cybersecurity. You will explore OT risk frameworks, critical infrastructure cybersecurity frameworks, IEC 62443 recap, NIST SP 800-82, ISO/IEC 27019, NIS2 and DORA mapping to OT controls, audit and maturity assessment, mining OT, oil and gas OT, transportation OT, rail, aviation, ports, smart infrastructure, industrial IoT, AI-driven predictive maintenance, cloud, digital twins, and emerging technology considerations.This course is also useful for learners preparing for CompTIA SecOT+ and GIAC GICSP-style industrial cybersecurity knowledge. It is not an official CompTIA, GIAC, or SANS course, and it does not claim endorsement or guaranteed exam coverage. However, the course strongly supports the practical knowledge areas these certifications emphasize, including OT safety, industrial systems, ICS architecture, Purdue/PERA, IEC 62443, protocols, endpoint hardening, threat modeling, monitoring, incident response, wireless technologies, disaster recovery, and business continuity.By the end of this course, you will be able to think, speak, design, assess, and respond like an OT security professional. You will understand how to protect industrial systems without blindly applying IT controls, how to communicate with operations and engineering teams, how to design practical OT security architectures, and how to build security programs that support safety, reliability, and resilience.