Flagship practice
Security for systems that cannot stop.
We secure operational technology, industrial control systems and SCADA environments with an approach built around safety, availability and the realities of the plant floor.
Industrial networks were built to run, not to be attacked.
Control systems often run for decades, rely on protocols with no authentication, and were designed to be isolated. Today they connect to enterprise networks, remote vendors and cloud analytics.
In these environments a security incident is an operational event. It can halt production, disrupt services or put people and equipment at risk. Standard IT practices such as aggressive scanning, frequent patching and automatic blocking can themselves cause harm.
OT security requires engineers who understand both worlds and who change nothing without understanding the process first.
Zones and conduits
- L4 / L5Enterprise zoneBusiness systems, email, ERP, internet
Controlled conduit: firewall and brokered data flows
- L3.5Industrial DMZHistorian replicas, patch and remote-access servers
No direct traffic between enterprise and control
- L3Site operationsHistorians, engineering workstations, OT services
Monitored conduit: allow-listed industrial protocols
- L2Supervisory controlSCADA servers, HMIs, alarm systems
Segmented by process cell
- L0 / L1Control & processPLCs, RTUs, safety systems, sensors and actuators
What we do
- OT Security Assessment
- Passive-first assessment of industrial networks, assets, connections and controls, scaled to operational constraints.
- Architecture & Segmentation
- IT/OT segmentation, zone-and-conduit design, industrial DMZs and secure data flows to business systems.
- Asset Visibility & Risk
- Asset inventory and risk characterization of controllers, HMIs, engineering workstations and field devices.
- Secure Remote Access
- Design and review of vendor and staff remote access to industrial environments.
- OT Monitoring & SOC Integration
- Design of SIEM/SOC monitoring for SCADA and IoT environments, including segregated networks.
- OT Incident Response
- Response procedures and playbooks that protect safety and production while the incident is handled.
How an engagement runs
Understand the process
Walk the environment with operations and engineering; define safety and availability constraints.
Observe passively
Map assets, protocols and flows from network data without disturbing the process.
Assess risk
Identify exposures, weak conduits and gaps against ISA/IEC 62443 and site requirements.
Plan & implement
A phased roadmap that fits maintenance windows, with support through implementation.
What leadership gains
- Operational resilience
- Visibility
- A realistic roadmap
Technical depth
For practitioners
For OT engineers, plant security and CISOs: the attack surface, our methodology and the environments we design for.
OT attack surface
- IT/OT convergenceFlat or poorly filtered paths between enterprise and control networks.
- Remote accessVendor connections, unmanaged VPNs and remote desktop tools reaching control systems.
- Insecure protocolsIndustrial protocols designed without authentication or integrity checks.
- Legacy platformsUnsupported operating systems and firmware that cannot be patched on IT timelines.
- Engineering workstationsHigh-value hosts able to reprogram controllers.
- Supply chainIntegrators, maintenance laptops, removable media and vendor software updates.
Methodology
- Safety firstActive testing only where safe, agreed with operations, and preferably on test or offline systems.
- Passive discoveryAsset and protocol identification from traffic captures and configuration review.
- Defense in depthControls layered across zones, conduits, hosts and procedures.
- Human elementProcedures, access practices and awareness of operations and maintenance staff.
Environments we design for
Our methodology applies across industrial and infrastructure environments. Specific sector experience is discussed per engagement.
- Energy & utilities
- Water & wastewater
- Manufacturing
- Transportation, ports, airports & rail
- Smart cities & municipal infrastructure
- Building management & IoT
Frameworks we align with
We use these frameworks to structure our work. Alignment does not imply certification.
- ISA/IEC 62443
- NIST SP 800-82 Rev. 3: Guide to OT Security
- Purdue reference model
- MITRE ATT&CK for ICS
Questions leaders ask
Will an assessment disrupt our operations?
It should not. We start passively, agree every activity with operations in advance and avoid active testing on live control systems unless it is explicitly approved and safe.
Our control network is air-gapped. Are we safe?
Isolation helps, but it is rarely complete. Removable media, maintenance laptops, vendor access and data transfers create paths. We verify what the isolation really looks like.
Can OT be monitored by our existing SOC?
Often yes, with the right sensors, data flows and use cases. We design SIEM/SOC monitoring for SCADA and IoT environments, including segregated networks, so that analysts understand industrial context.
Start with what is running today.
A short conversation is enough to scope an OT assessment around your operational constraints.