OT Network Assessment for Industrial and Critical-Infrastructure Environments

What an OT Network Assessment Actually Delivers

• Reachable-network map anchored on the environment as it actually operates. The documented diagram is a starting reference, not the deliverable.
• Segmentation-reality assessment. Which network paths actually exist between the enterprise IT, the DMZ and the operational layers, and where the paths do not match the documented model.
• Undocumented-path inventory. Vendor-installed gateways, cellular modems, maintenance modems, forgotten interconnects and remote-access channels the current operational team was not aware of.
• Communication-profile baseline. Which devices talk to which devices, on which protocols, with what regularity, so future anomaly detection has something to be an anomaly against.
• Remediation prioritized by consequence. Architectural changes needed to close the reachable paths that matter, not a device-by-device list.
• Compliance-file artifacts that map into NERC CIP, TSA, EPA, USCG MTSA or the applicable sector framework directly.

How the Assessment Actually Works

Scope is defined in writing before the engagement starts: the environment’s stated architecture, the operational calendar, safety constraints on any active testing, and the specific concerns the operator wants prioritized. Every step is coordinated with the OT operations team.

• Passive network observation over an operational window (typically one to two weeks) to capture normal traffic and the maintenance and change activity that happens on the plant’s schedule.
• Reachable-inventory reconstruction from the observed traffic, cross-referenced against the operator’s asset system, with the discrepancies documented.
• Path enumeration across the network layers, identifying every path between segments the documented model does not describe.
• Physical-interface audit where undocumented paths are identified through traffic observation, tracing the interface to the specific device and the specific installation event that put it there.
• Controlled active testing of specific findings during authorized windows, where the target devices and communication paths are documented to tolerate the test.
• Segmentation-model reconstruction against the actual reachable environment, and remediation planning to align the reachable model with the intended one.

The IT/OT Boundary

Most consequential findings live at the boundary between IT and OT rather than within either domain in isolation. The DMZ that was designed correctly at commissioning but has accumulated exceptions. The historian that reaches into both domains. The maintenance jumphost that no longer has a business owner. The vendor remote-access path that predates the current operational team. Assessment focused on the boundary produces the findings that most directly determine whether an IT-side compromise reaches OT.

Full Critical Infrastructure Cybersecurity Compliance

Network assessment is one component of the full Critical Infrastructure Cybersecurity Compliance suite our Miami practice runs for SCADA and OT operators, alongside continuous vulnerability management, testing, forensic incident response, and the documentation posture that survives regulator and insurer examination. Assessment work is scoped against the specific framework each operator is accountable to and produces artifacts that map into the compliance file directly.

Network assessment findings map into the specific sector framework the operator is accountable to: NERC CIP for bulk electric system entities, TSA Security Directives for pipeline and rail, EPA Cybersecurity Rule for public water systems, USCG MTSA cyber requirements for MTSA-regulated port and vessel facilities, and the FAA and EASA cybersecurity framework for airworthiness-adjacent OT. The remediation record is structured so it slots into the compliance file rather than requiring translation.

Where Our Miami OT Network Practice Runs Deepest

Port and maritime operations

Terminal operating systems, gantry and RTG crane control, gate systems, fuel and utility distribution and MTSA-scoped facility networks. Segmentation review for the paths between the terminal operations environment, the enterprise IT network and the vendor remote-access infrastructure.

Water and wastewater

Distribution SCADA, treatment plant control networks, remote-site telemetry, and the vendor and consultant remote-access paths that reach into these environments.

Power and generation

Substation, generation and behind-the-meter cogeneration network environments, with attention to the vendor and OEM remote-access paths and the historian tiers that bridge segments.

Airport and aviation-adjacent facilities

Airport ground systems, fuel and de-icing infrastructure, terminal building-automation and apron OT. Coordinates with the aviation cybersecurity practice on airworthiness-adjacent scope.

Manufacturing, cold-chain and cruise-line shore facilities

Segmentation review for pharmaceutical, food-and-beverage and cold-chain manufacturing environments, and for the shore-side facilities that support cruise-line operations.

Standards and Standing

Methodology anchored on NIST SP 800-82 Rev.3, IEC 62443, the ISA/IEC Purdue Enterprise Reference Architecture, and the sector-specific standards each operator is accountable to. Assessors hold GICSP, GRID, OSCP and CISSP among other credentials. Reports are structured for authentication under Fla. Stat. § 90.901 and Federal Rules of Evidence 902(13) and 902(14) where the record may later be produced in litigation or regulatory proceedings.