OT Security Solutions for Australian Industrial Organisations
Intrix delivers OT security solutions for Australian manufacturers, utilities, and critical infrastructure operators. Our assessments follow the ISA/IEC 62443 standard and use passive, OT-safe techniques that identify vulnerabilities in PLCs, ICS, and SCADA systems without disrupting production.
ICS, SCADA and OT Cyber
Security Assessments Australia
ISA/IEC 62443 is the globally recognised standard for industrial automation and control system (IACS) security. It provides a comprehensive framework designed specifically for OT environments
Purpose-Built for OT
ISA/IEC 62443 is tailored for industrial systems—built to handle availability, legacy tech, and safety requirements
Defence-in-Depth Approach
It provides layered defence-in-depth through zones, conduits, security levels, and secure development requirements
Measurable Security Levels
The standard sets four Security Levels (SL-1 to SL-4) to match your security needs to your operational risk
Industry Adoption
ISA/IEC 62443 is globally adopted, vendor-endorsed, and increasingly required by insurers and regulators
The Intrix OT Security Assessment (ISA/IEC 62443)
We are specialists in industrial cyber defence. We understand that you can’t apply generic IT security to a sensitive production environment. Our methodology is based on the leading international standard for industrial cybersecurity, ISA/IEC 62443
OT-Safe Assessment
We perform a specialised assessment of your manufacturing environment against the IEC 62443 standard, identifying risks across people, processes, and technology without disrupting operations
Comprehensive asset inventory of OT systems, PLCs, HMIs, and SCADA components
Zone and conduit security architecture review per ISA/IEC 62443-3-2
Security Level (SL) target assessment and gap analysis
Foundational Requirements (FR) compliance evaluation
Risk assessment using ISA/IEC 62443-3-2 methodology
Human factors and procedural security review
Vendor and supply chain security assessment
OT Network Visibility & Monitoring
We deploy passive, OT-safe monitoring tools to give you a complete inventory of your industrial assets, map their communications, and detect threats in real-time—all without risking disruption to your operations
Passive network monitoring using OT-specific protocols (Modbus, DNP3, Profinet, EtherNet/IP)
Deep packet inspection (DPI) for industrial protocols
Anomaly detection for unauthorised changes to PLC logic or setpoints
Real-time alerting for suspicious OT network behaviour
Continuous asset discovery and baseline monitoring
Zero impact deployment—no agents, no active scanning
Comprehensive OT Security Services
Specialised incident response for OT environments where safety and production continuity are paramount
OT Penetration Testing
Controlled, OT-safe penetration testing to identify exploitable vulnerabilities in your industrial environment
Wireless OT Security
Specialised security for wireless OT protocols (WirelessHART, ISA100.11a, etc.)
OT Security Architecture
Design secure OT architectures for new facilities or modernisation projects
Frequently Asked Questions
Why can't traditional IT security be applied to OT environments in Australia?
OT systems prioritise availability and safety over confidentiality, run legacy equipment that cannot be patched, and use proprietary protocols that standard IT tools cannot handle safely. Vulnerability scanners commonly used in IT assessments can crash PLCs and SCADA systems, causing production outages. Australian critical infrastructure operators require OT-specific methodologies that account for these constraints.
What is OT-safe testing and why does it matter for Australian manufacturers?
OT-safe testing uses passive monitoring techniques that capture and analyse existing network traffic without sending commands or probes to operational devices. This eliminates the risk of crashing PLCs, RTUs, or SCADA systems during the assessment. For Australian manufacturers operating under the Security of Critical Infrastructure Act 2018, this approach ensures compliance obligations can be met without production risk.
How long does an ISA/IEC 62443 assessment take?
Most ISA/IEC 62443 assessments take four to six weeks for a single site, covering asset discovery, gap analysis, zone and conduit mapping, and risk prioritisation. Larger environments with multiple systems or network segments require additional time. A full Cybersecurity Management System build following the assessment typically extends the engagement to several months.
Can Intrix assess our OT environment without causing downtime?
Yes. Assessments use passive monitoring techniques that observe network traffic without sending commands or probes to operational devices. Where active testing is required, it is performed on isolated lab environments that replicate the production configuration, or scheduled during planned maintenance windows in coordination with your operations team.
Do you conduct OT security assessments across multiple sites in Australia?
Yes. Multi-site assessments combine on-site visits to each facility with remote analysis of captured data, architecture documentation, and configuration files. A standardised methodology is applied across all sites to enable consistent risk benchmarking. Findings are consolidated into a single report that prioritises remediation across the entire environment based on operational criticality. We work with clients across Sydney, Melbourne, Brisbane, Perth, and regional industrial sites.
Is OT security required under Australian law?
Australian operators of critical infrastructure assets, including energy, water, manufacturing, and transport, are subject to the Security of Critical Infrastructure Act 2018 and its amendments. This legislation requires asset owners to implement and maintain a critical infrastructure risk management programme. An ISA/IEC 62443 assessment directly supports compliance with these obligations and demonstrates due diligence to regulators and insurers.
Protect Your Production, Your People, and Your Plant
Don’t let outdated security practices put your manufacturing operations at risk. Contact Intrix for an OT-safe security assessment based on ISA/IEC 62443