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January 26, 2025

OT/ICS Security: Managing the Convergence Risk

As operational technology connects to IT networks for efficiency, the attack surface for plants, utilities, and logistics grows. Here is how to secure the convergence.

Operational technology that once ran in isolation now connects to enterprise networks for remote monitoring, predictive maintenance, and analytics. That connectivity delivers real efficiency gains, but it also exposes control systems designed decades ago for reliability, not for resisting modern cyber threats. Incidents affecting utilities, manufacturing, and logistics over the past few years show that OT is now a mainstream target.

Where IT and OT security diverge

Patch cycles, asset lifecycles, and tolerance for downtime differ sharply between IT and OT. A control system cannot simply be rebooted for a security update during production. Effective programs build an accurate OT asset inventory first, then apply network segmentation between IT and OT zones with tightly controlled data diodes or one-way gateways where full isolation is not feasible.

Monitoring should be passive where possible to avoid disrupting sensitive equipment, with anomaly detection tuned to industrial protocols rather than generic IT signatures. Incident response plans must include safety implications, not only data confidentiality, and should be rehearsed with plant operations teams, not only security staff.

JIG works with industrial and infrastructure operators to secure OT/IT convergence without compromising the safety and uptime these systems exist to guarantee.