Scott Christensen of GrayMatter and Dominic Busa from Airwall (JCI) discuss the real-world challenges of securing operational technology environments .

Scott and Dominic unpack the limitations of traditional firewall-based security and explain the shift toward identity-defined networking, micro-segmentation and zero trust. Instead of assuming that devices on the same network should trust each other, the model moves toward explicit, policy-driven communication — where Machine A can only talk to Machine B if it’s explicitly allowed .

A major theme: segmentation doesn’t have to mean disruption. Through overlay networking, manufacturers can wrap policy around existing flat networks without ripping and replacing infrastructure or taking production offline .

The episode also covers:

• Secure, time-bound remote access for OEMs and contractors

• Replacing costly private radio networks with secure cellular

• Protecting legacy, un-patchable systems through compensating controls

• Reducing public asset exposure and shrinking attack surfaces

• Embedding cybersecurity into digital transformation strategies instead of bolting it on later

If you're modernizing operations, moving data to the cloud, or expanding remote access, this episode makes one thing clear: cybersecurity isn’t a checkbox. It’s infrastructure for digital transformation. Visit graymattersystems.com.