Your control system is on a network.
Is it defended?
OT cybersecurity services aligned to IEC 62443 and NIST CSF — protecting your control system without disrupting the operations it controls.
Everything on one network. No segmentation, no monitoring, no visibility into what's happening on the control layer.
- —Shared accounts and default passwords
- —Always-on vendor VPN access
- —No incident response plan
Zones, conduits, and monitoring designed to protect the process without disrupting it.
- Role-based access with MFA
- Managed, time-limited vendor access
- Documented response procedures
Not IT security
applied to the plant floor.
Today, your control system is connected. Connected to historians. Connected to MES. Connected to cloud analytics. Connected to remote access for your integrators. Every one of those connections is a pathway — for data out and for threats in.
Industrial cybersecurity isn't IT security applied to the plant floor. The priorities are different. In IT, confidentiality comes first — protect the data. In OT, availability comes first — keep the process running. A security measure that causes a controller to lose communication and trip a line isn't a security improvement. It's a production incident.
Security architecture protecting your control system without disrupting the operations it controls.
Six layers of
OT security.
OT Network Assessment and Vulnerability Analysis
Comprehensive assessment of your existing control system architecture, device inventory, communication flows, and security posture. We map every device on the network — PLCs, HMIs, switches, historians, engineering workstations, remote access points — and identify vulnerabilities: unpatched systems, default credentials, flat network architectures, unauthorized connections, and legacy protocols with no authentication. The assessment is non-intrusive. We use passive network monitoring, configuration review, and physical inspection.
Network Segmentation and Architecture Design
Network architecture that separates control, supervisory, enterprise, and external access zones with properly configured firewalls, industrial DMZs, and access control policies. The architecture follows the Purdue Reference Model (ISA-95 / IEC 62443) adapted to your facility. VLAN design, switch configuration, firewall rule sets, and routing policies engineered for the specific protocols your control system uses — EtherNet/IP, PROFINET, Modbus TCP, OPC UA — so security policies don't break communication.
Access Control and Identity Management
Role-based access control for control system components. Elimination of shared accounts, default passwords, and anonymous access. Individual user accounts with appropriate privilege levels — operators, maintenance technicians, engineers, integrators, and administrators each get the access they need and nothing more. Secure remote access solutions with multi-factor authentication, session logging, and time-limited access for vendors and integrators.
Continuous Monitoring and Threat Detection
Passive network monitoring that observes OT network traffic and detects anomalies — unauthorized devices, unexpected communication patterns, protocol violations, and changes to controller configurations. Industrial-specific monitoring tools (Claroty, Nozomi Networks, Dragos, Microsoft Defender for IoT) that understand OT protocols. Alert routing with context — not just 'anomaly detected' but actionable information your team can respond to.
Incident Response Planning
OT-specific incident response plans that account for the reality that you can't just shut down a reactor, a water treatment plant, or a food processing line because a security alert fired. Response procedures for ransomware, unauthorized PLC program changes, compromised remote access, and insider threats. Decision criteria for when to isolate versus continue under heightened monitoring. Tabletop exercises so the first time your team executes the plan isn't during an actual incident.
Patch Management and System Hardening
OT patch management strategies that account for the reality that you can't auto-update a PLC the way you update a laptop. Patch assessment, testing, and deployment procedures scheduled around maintenance windows. System hardening: disabling unnecessary services, closing unused ports, removing unnecessary software, configuring host-based firewalls, and applying CIS benchmarks to Windows-based SCADA and HMI servers. USB device policies and application whitelisting.
Every connected
control system.
If your control system is on a network — and it is — it needs a security program designed by people who understand both the threats and the process.
Manufacturing
Protecting PLC and SCADA systems on production lines from ransomware, unauthorized access, and configuration tampering. Network segmentation between IT and OT environments.
Water and Wastewater
Securing municipal and industrial water treatment SCADA systems. Addressing CISA advisories and sector-specific threats targeting water infrastructure. Remote access security for distributed facilities.
Oil and Gas
Pipeline SCADA security, wellhead monitoring protection, and refinery control system hardening. Compliance with TSA Pipeline Security Directives and API 1164.
Energy and Utilities
NERC CIP compliance for bulk electric system operators. Substation network security, generation facility control system protection, and distributed energy resource cybersecurity.
Chemical and Petrochemical
Safety Instrumented System (SIS) network isolation, DCS security, and CFATS cyber compliance. Protecting systems where a security breach has potential safety consequences.
Pharmaceuticals
Protecting validated systems where unauthorized modifications trigger compliance events. Audit trail integrity, electronic record security, and network isolation for GMP-critical systems.
From assessment
to sustained protection.
Assess.
Comprehensive OT network assessment: asset inventory, network architecture mapping, vulnerability identification, and risk evaluation. We deliver a documented report with findings and prioritized recommendations. This phase typically takes 1–3 weeks on-site depending on facility size and complexity.
Plan.
Security architecture design and remediation roadmap. Network segmentation design, access control policies, monitoring strategy, and incident response plan development. The roadmap is phased and prioritized — addressing the highest-risk items first within your operational and budget constraints.
Implement.
Network infrastructure changes (switches, firewalls, VLANs), access control deployment, monitoring tool installation and configuration, remote access solution implementation, and system hardening. Changes implemented during maintenance windows with rollback procedures in place.
Validate.
Post-implementation verification that security controls are functioning correctly and that control system communication is unaffected. Network traffic analysis to confirm segmentation policies are enforcing as designed.
Sustain.
Ongoing monitoring, quarterly vulnerability reviews, annual reassessments, and incident response support. The threat landscape changes. New vulnerabilities are disclosed. Your network evolves. Security is a continuous program, not a one-time project.
Tools and frameworks.
Security architecture aligned to recognized industrial frameworks — not IT policies applied to OT without adaptation.
Controls engineers
who understand security.
OT engineers who understand security, not IT consultants learning OT.
Most cybersecurity firms approach OT networks with an IT mindset — scan everything, patch everything, lock everything down. That approach breaks control systems. We're controls engineers first. We understand that a PLC can't run endpoint protection, that a PROFINET network can't tolerate misconfigured firewall latency, and that taking the historian offline for patching creates a compliance gap in a pharma plant.
Non-intrusive by default.
We don't run Nessus against your PLCs. We don't inject test traffic into your control network. Our assessments use passive monitoring, configuration review, and physical inspection — methods that give us complete visibility without any risk to your process. Active scanning in an OT environment is reckless, and we won't do it.
Security as architecture, not as product.
We don't sell a monitoring appliance and call it a cybersecurity program. We design security into the network architecture — zone segmentation, conduit control, access management, and monitoring — so the protection is structural and durable. Products support the architecture. They don't replace it.
We protect availability first.
In IT, confidentiality comes first — protect the data. In OT, availability comes first — keep the process running. A security measure that protects data but causes a controller to lose communication and trip a line isn't a security improvement. It's a production incident. Every security control we implement is validated against your operational requirements.
Not if they're designed correctly. Every change we make is tested against the communication requirements of your control system. We verify that PLC-to-HMI traffic, historian data collection, and inter-controller communication function correctly before and after security implementation. We schedule changes during maintenance windows with rollback plans. We've never caused a production stoppage from a security implementation — because we treat OT security as an engineering discipline, not an IT policy exercise.
The question isn't whether you've been attacked — it's whether you'd know if you had been. Many OT environments have no monitoring, no logging, and no visibility into what's happening on the control network. Additionally, insurance underwriters, customers, and regulators are increasingly requiring documented OT security programs. The investment is both risk reduction and business enablement.
Yes. Our assessments are entirely non-intrusive. We use passive network monitoring, configuration review, and physical inspection. We don't run active scans against control devices, inject test traffic, or modify any configurations during the assessment phase.
They should be coordinated but not identical. IT security tools and policies often don't account for OT constraints — real-time communication requirements, legacy operating systems that can't be patched, and devices that can't run endpoint protection. We work with your IT security team to build an OT security program that integrates with your broader security framework while respecting the operational requirements of the control system.
Vendor remote access is one of the most common attack vectors in OT environments — and one of the easiest to address. We implement managed remote access solutions with individual accounts, multi-factor authentication, session logging, and time-limited access. Your vendors get the access they need. You get visibility and control over that access.
An initial assessment for a single facility typically ranges from $15,000 to $50,000 depending on size and complexity. Network segmentation implementation varies widely based on existing infrastructure. Ongoing monitoring and program management can be structured as a retainer. We scope every engagement based on your specific environment and risk profile.
Straight answers.
Ready to secure your control systems?
Whether it's an initial assessment, a network segmentation project, or an incident response plan — tell us where you are and we'll help you figure out the next step.