Segmentation first — with out ready for the large retrofit
As an alternative of ready a decade to exchange each legacy element, I collaborate with many purchasers to first construction the community structure per IEC 62443 rules. Meaning defining zones and conduits, putting in firewalls and industrial DMZs, consolidating and hardening distant entry. Even when legacy programs maintain working inside these zones, clear segmentation massively reduces choices for lateral motion.
Monitoring that understands OT
Traditional IT security instruments hit their limits in OT environments in the event that they don’t know protocols, course of traits and working modes. That’s why I advocate integrating OT-specific monitoring options into an present SOC or a devoted OT SOC — with use instances centered on industrial anomalies, like surprising PLC program adjustments, uncommon communication paths or atypical course of values. Solely with this visibility can organizations shift from reactive firefighting to proactive detection and containment.
Regulation as leverage — not impediment
Sector-specific mandates and requirements like ISO 27001 or IEC 62443 aren’t burdensome compliance for my part, however a politically and legally backed enterprise case for security. In tasks, I translate authorized necessities right into a roadmap with concrete controls: from threat administration and incident response to provide chain security and enterprise continuity planning. This helps administration legitimize investments and make priorities clear — together with the message that inaction beneath evolving rules is not an possibility.
