Protect physical processes where uptime beats patch cadence.
OT Security sits where bits meet atoms. The discipline runs on different rules from IT — availability dominates, patch windows are rare, and legacy PLCs aren't going anywhere. Expect deep familiarity with the Purdue model and IEC 62443.
Tools in scope
Energy / utilities
NERC CIP, safety-system interactions, and downtime tolerance tested deeply.
Manufacturing
More on legacy PLC support, vendor remote access, and shopfloor segmentation.
// Sample question
A plant manager refuses a patch cycle on a Level 2 HMI because of production targets. How do you reduce risk without the patch?
Compensate with segmentation and monitoring: tighten firewall rules between Levels 2 and 3, enforce one-way data diodes where possible, deploy passive ICS monitoring to baseline traffic, and document the accepted risk with a planned patch window during the next scheduled outage.
AI-graded, role-specific, feedback on every answer. Free to start.