Critical Infrastructure and Operational Technology.

Network security for environments where safety, availability, and continuity come first, delivered around operations rather than through them.

Ask Us How

Critical infrastructure depends on IT networks that have evolved through legacy decisions, vendor access, and operational workarounds. The boundary between enterprise IT and operational technology is often blurred, remote access has been added piecemeal, and visibility is thin where it matters most. Mesh engineers specialise in the networks that run critical infrastructure, where IT meets operational technology. Every change carries a defined rollback position and aligns to maintenance windows, so the work fits around operations rather than interrupting them.

What We Deliver

IT-OT Network Separation and Segmentation. Mesh builds and holds the boundaries between enterprise IT and operational environments.

  • Purdue-aligned network zoning

  • IEC 62443 zones and conduits with target Security Levels

  • Industrial DMZ (IDMZ) design and brokered interfaces

  • Default-deny conduit governance

What You Get

Secure Access and Network Hardening. Mesh treats remote and vendor access as a controlled conduit, brokered and recorded rather than left open.

  • Brokered privileged access through hardened jump hosts

  • Phishing-resistant MFA, time-bound and recorded sessions

  • Vendor access control terminating in the OT DMZ

  • Network device and access pathway hardening

Critical networks with clear boundaries between IT and OT, controlled and recorded vendor and remote access, and visibility where operational risk concentrates. Exposure reduced without compromising safety, availability, or continuity, with controls verified as implemented and functioning rather than just designed, all while the plant keeps running.

Network Visibility and Operational Readiness. Mesh establishes visibility across critical boundaries and integrates it into existing security and operations workflows.

  • OT-aware monitoring, logging, and telemetry

  • Out-of-band management resilient under degraded conditions

  • Integration into SOC, SIEM, and incident response processes

Security Governance and Assurance. Mesh verifies that controls are implemented and functioning, where most assessments find their highest-risk gaps.

  • Risk assessment against SOCI, AESCSF (SP-1 and SP-2), ISM, and PSPF

  • IEC 62443 assurance

  • CI Fortify and the Secure Connectivity Principles for OT