When Systems
Fail,
People Get Hurt
OT and ICS environments weren't designed with cyber threats in mind. We assess your industrial infrastructure — SCADA, PLCs, HMIs, and field devices — without disrupting a single process, finding the vulnerabilities before an adversary does.
OT Attack Surface
Every assessment covers the full OT stack — from field devices and PLCs up through SCADA servers, historian databases, and IT/OT boundary weaknesses.
Review of Programmable Logic Controllers and Remote Terminal Units for default credentials, unauthenticated programming ports, firmware vulnerabilities, and unencrypted ladder logic exposure.
Assessment of SCADA servers and HMI workstations — unpatched OS, weak authentication, insecure remote access (RDP/VNC), historian database exposure, and operator screen injection.
Analysis of DMZ architecture, firewall rule-sets, jump server configurations, data diode implementations, and network segmentation — identifying lateral movement paths from IT to OT networks.
Passive and active analysis of industrial protocols for authentication weaknesses, replay attack exposure, man-in-the-middle vulnerabilities, and unauthenticated command injection risks.
Review of vendor remote access channels, cellular modems, VPN configurations, and cloud-connected IIoT gateways — the most common initial access vectors into OT environments.
Passive network monitoring to build a complete OT asset inventory — identifying rogue devices, unmanaged PLCs, and shadow OT assets that security teams don't know exist on the network.
Purdue Model Coverage
We assess every level of the Purdue Reference Model — with non-disruptive passive techniques used at levels 0–2 to protect live operations.
ERP, MES, corporate IT — entry point for most OT breaches via spear-phishing and supply chain compromise.
Production scheduling, historian servers, data aggregation — the bridge between corporate and control networks.
Data diodes, firewalls, jump servers — the critical boundary that separates IT from OT. Misconfigurations here are catastrophic.
Supervisory systems — SCADA servers, HMI workstations, DCS engineering stations operating the physical processes.
Field controllers executing real-time process logic — disruption here means physical process failure with potential safety consequences.
Physical instrumentation — temperature sensors, pressure valves, motor drives. Compromise here directly affects physical safety.
Engagement Methodology
Every OT assessment is designed around one non-negotiable constraint — operational continuity. We find critical vulnerabilities without taking systems offline.
OT Environment Scoping
Collect network diagrams, asset lists, and vendor documentation. Define safety-critical systems that require passive-only testing. Agree rules of engagement and emergency contact escalation procedures with operations staff.
Passive Network Monitoring
Deploy a SPAN port capture or TAP to passively monitor OT network traffic. Identify all communicating assets, protocols in use, unencrypted command traffic, and anomalous communications — zero impact on operations.
Architecture & Configuration Review
Manual review of SCADA/HMI configurations, PLC ladder logic (offline), firewall rule-sets, remote access configurations, and patch status — identifying critical vulnerabilities from documentation alone.
IT/OT Boundary Testing
Active penetration testing of IT networks with controlled lateral movement attempts toward OT network boundaries — assessing whether an IT compromise can pivot into OT systems via DMZ weaknesses.
Industrial Protocol Assessment
Controlled analysis of industrial protocol implementations — checking for unauthenticated read/write access to Modbus registers, DNP3 replay vulnerabilities, OPC-UA trust misconfigurations, and BACnet enumeration exposure.
Reporting & Remediation
Detailed findings report with IEC 62443 and NERC CIP mapping, risk-rated vulnerabilities, and operationally-aware remediation guidance that accounts for patching constraints in live OT environments.
Tools Used
OT-safe tooling combined with passive monitoring frameworks — nothing that can cause process disruption is used without explicit written authorisation.
What You Get
OT Risk Assessment Report
Comprehensive findings report covering every assessed layer — from field device exposure to IT/OT boundary weaknesses — with CVSS scores, attack path diagrams, and operational risk impact ratings.
Complete OT Asset Inventory
A full inventory of every discovered OT asset — PLCs, RTUs, HMIs, field devices, and communication paths — many of which organisations discover for the first time during an assessment.
IEC 62443 & NERC CIP Mapping
Findings mapped to IEC 62443 Security Levels and NERC CIP requirements — with a gap analysis showing current vs target Security Level for each OT zone and conduit.
Network Segmentation Report
Annotated network diagrams showing actual traffic flows, identified flat-network risks, IT/OT bridging points, and recommended segmentation improvements with implementation guidance.
Operationally-Aware Roadmap
A prioritised remediation plan that accounts for OT patching constraints, maintenance windows, and operational availability requirements — so fixes don't create new operational risks.
Compliance Certificate
Signed assessment certificate mapped to IEC 62443, NERC CIP, NIST SP 800-82, and sector-specific regulatory requirements — for use with insurers, regulators, and critical infrastructure bodies.
Your Facility Keeps
Running. We Find
Every Weakness.
OT security assessments require a different approach — one that respects operational constraints while finding vulnerabilities that could shut down production or cause physical harm. That's exactly what we do.