For decades, the rule was simple: operational technology (OT) ran the plant; information technology (IT) ran the office; and the two networks were air-gapped from each other. In 2026, that wall is largely gone. The pressure to integrate — for remote monitoring, predictive maintenance, supply chain visibility, ESG reporting — has won. The risk to manage is real.
Industrial operators in Baytown and out to Beaumont are now asking how to safely connect what was deliberately disconnected. Here’s what’s working in 2026.
Why OT and IT can no longer be kept apart
Five pressures, all happening at once:
- Predictive maintenance requires sensor data to flow from OT systems to cloud analytics platforms.
- Remote monitoring by vendors and corporate engineers means OT systems must be reachable from outside the plant.
- Supply chain visibility means real-time production data flowing to ERP and customer-facing systems.
- Regulatory reporting (emissions, safety, ESG) increasingly requires automated data collection from OT.
- Workforce reality — the people who know how to keep an air-gapped legacy system running are retiring.
Network segmentation done right
You can’t put OT and IT on the same flat network. You also can’t keep them completely separate. The middle ground is segmentation with controlled gateways.
The Purdue Model is still the reference architecture for industrial cybersecurity in 2026. Simplified:
- Level 0-1: physical processes, sensors, actuators
- Level 2: control systems (PLCs, SCADA, HMIs)
- Level 3: site operations, historians, production scheduling
- Level 3.5 (DMZ): the controlled gateway between OT and IT
- Level 4-5: corporate IT, business networks
The key practice: traffic only crosses zones through hardened, monitored gateways. Direct connections from corporate IT to OT control devices are not allowed. Vendor remote access goes through a jump host with MFA and session recording.
Real Houston-area OT incidents in 2025
We can’t name names, but the patterns repeated:
- Engineering laptop infected via phishing was later docked into a plant network for a vendor maintenance session. Malware spread to the control network.
- An exposed remote desktop service on an HMI was brute-forced from the open internet. Production interrupted for hours.
- A third-party vendor’s compromised credentials gave attackers persistent access to a control system for months before discovery.
- A USB drive used for legitimate firmware updates carried malware between sites.
None of these required exotic attacker capability. All would have been prevented by basic segmentation and identity controls.
What small contractors serving these plants should do
If you’re a small business that does work inside Baytown / Beaumont industrial facilities — inspection, maintenance, equipment, IT services — you are now part of your customer’s security perimeter.
Practical steps:
- Treat your laptops as if they will touch a customer’s OT network. EDR, full-disk encryption, MFA, current OS patches. No exceptions.
- Use a separate, dedicated device for OT work. Don’t let your everyday email/web laptop touch a control network.
- Bring your own USB media that’s been wiped and verified. Better: don’t use USB. Use sanctioned file-transfer methods.
- Document your security posture. Have a one-page attestation ready when the operator asks (and they will).
- Background-check field staff. Many operators now require this for any worker entering the plant.
What plant operators should ask their vendors
If you’re on the operator side, your vendor questionnaire should cover:
- Is MFA enforced on all vendor accounts that touch your environment?
- What endpoint protection runs on devices the vendor brings on-site?
- Does the vendor maintain an incident response plan? Tested?
- What’s the vendor’s process for offboarding personnel who had access?
- How is vendor remote access controlled, logged, and time-limited?
Want help integrating OT and IT safely?
This isn’t a do-it-yourself area. The cost of getting OT cybersecurity wrong is measured in production hours, safety, and sometimes lives. Our IT consulting practice works with Baytown-area operators and their vendors on segmentation, vendor management, and incident response design. Book a discovery call and we’ll set up a working session.
Aspendora Technologies provides cybersecurity and managed IT services to Baytown, Houston, and Texas Gulf Coast industrial businesses since 2010.