Protect the Process - Not Just the Packets.

Parasyn secures critical infrastructure where a cyber event doesn’t just steal data — it stops production, endangers lives, and disrupts communities. Engineering-led OT security for Australia’s most critical operational environments.

IEC 62443 Industrial Security Standard

5 Service Pillars

24/7 Zero-Disruption Implementation

0 Tolerance for Process Downtime

IEC 62443 Architecture /// SOCI Act Compliance /// Network Segmentation /// Anomaly Detection /// Secure Remote Access /// OT Incident Response /// Vulnerability Intelligence /// Managed Resilience /// ISO 27001 Aligned /// Sovereign Australian Capability

Why Parasyn

Operational Integrity. Above All Else.

We bridge the gap between traditional safety engineering and modern cyber threats — ensuring the physical process remains under control at all times.

Process-Aware Defence

We don’t just secure “packets.” We understand the PLC logic, SCADA telemetry, and industrial workflows they support — securing the system that controls the real world.

Zero-Disruption Implementation

Security controls are engineered specifically for 24/7 operational environments where “rebooting” is not an option. Every change goes through strict OT governance.

Safety as the Primary Metric

Protecting people, assets, and the community by ensuring the Control Mission is never compromised. Physical safety drives every security decision we make.

Sovereign Australian Capability

Local expertise that understands your site’s specific safe state. We provide ongoing support aligned to the engineering lifecycle — not a remote SOC with no OT context.

Service Catalogue

Ten Services. One Mission.

Every service is engineered around the realities of operational technology — where safety, availability, and integrity are non-negotiable requirements, not nice-to-haves.

01 🏗️

IEC 62443 Security Architecture & Design

Engineering the blueprint for Zones and Conduits to ensure a defensible network foundation aligned to industrial standards.

02 ⚠️

OT-Specific Risk & Consequence Assessment

Identifying critical process crown jewels and modelling the physical impact of potential cyber-events on operations.

03 🔒

Network Segmentation & Hardening

Physical and logical isolation of control environments to reduce the blast radius of any breach across zones and conduits.

04 🔑

Secure Remote Access Systems

Identity-based, encrypted gateways for secure internal and third-party vendor access — without opening the plant to the internet.

05 📡

Live Asset & Vulnerability Intelligence

Real-time, automated inventory of all field hardware, firmware versions, and serial numbers — continuous visibility across the OT estate.

06 👁️

Industrial Anomaly Detection

Monitoring OT protocols (Modbus, DNP3, and more) for irregular behaviour that indicates process tampering or adversarial intrusion.

07 ⚙️

Engineering Change & Configuration Management

Security updates managed through strict OT governance to ensure patches never cause process downtime or operational upset.

08 🚨

OT Incident Response & Safe State Playbooks

Site-specific recovery plans engineered to ensure a fast, validated return to production following any cyber incident.

09 📊

Managed Operational Resilience

Ongoing sovereign Australian support and performance monitoring to keep security aligned with your engineering lifecycle.

10 📋

Regulatory & SOCI Act Alignment

Engineering documentation and technical evidence required for critical infrastructure compliance under Australia’s Security of Critical Infrastructure Act 2018. We handle the evidence — you retain the licence to operate.

Service Pillars

Five Pillars. End-to-End Coverage.

Aligned with IEC 62443 · ISO 27001 · TS 50701 · SOCI Act 2018

01

Strategy & Compliance

• OT Cybersecurity Strategy
• SOCI Act Alignment
• Security Governance
• Policies & Standards
• Residual Risk Governance

02

Architecture & Engineering

• IEC 62443 Architecture
• Zones & Conduits
• OT Network Segmentation
• Secure Remote Access
• Legacy OT Security

03

Risk Assessment

• OT Asset Discovery
• High-Level Risk Assessment
• Detailed Risk Assessment
• Threat & Vulnerability Analysis
• SL-T Determination

04

Implementation

• Cybersecurity Requirements
• Security Control Design
• Segmentation Planning
• Secure Access Implementation
• Control Implementation Plan

05

Testing & Validation

• Security Validation Testing
• Test Procedures
• Control Verification
• Operational Readiness
• Residual Risk Acceptance

Defence in Depth

The Castle Mentality.

No single point of failure. We apply layered redundancy across the plant floor — if one security layer is bypassed, the core process remains shielded by the next.

• 🔐 Functional Segmentation (Zones)

Critical assets (PLCs, HMIs, SIS) grouped into hardened Zones. A compromise in one area cannot migrate to the Crown Jewels.

• 🌐 Controlled Communication (Conduits)

Every data flow between zones is a strictly defined, monitored tunnel permitting only verified, necessary operational traffic.

• 🔧 Legacy Lifecycle Extension

Wrapping older insecure-by-design hardware in a protective digital shell — avoiding premature or costly capital expenditure.

• 👤 Identity & Access Management

Role-based access control ensuring only authorised personnel and vendors can reach critical control systems.

Integrated Project Delivery

A Structured Lifecycle for OT Cyber Risk.

A repeatable, standards-aligned methodology for managing cybersecurity risks across operational technology environments — from first engagement to continuous monitoring.

1

Identification

Define engagement scope, objectives and regulatory context

2

Asset Visibility

Establish visibility of SCADA, PLCs, RTUs, historians, networks

3

Threat Analysis

Identify threat actors, attack paths and system vulnerabilities

4

Risk Assessment

Evaluate risks by likelihood, operational impact and safety

5

Controls Design

Define segmentation, access control and monitoring requirements

6

Risk Acceptance

Agree residual risk levels with stakeholders and asset owners

7

Monitor & Review

Ongoing monitoring, governance and periodic security review

Standards & Compliance

Built on the Right Foundations.

Every engagement is aligned to globally recognised industrial cybersecurity standards and Australia’s critical infrastructure regulatory framework.

IEC 62443

The global standard for Industrial Automation & Control Systems security. Zones, conduits, and security levels.

ISO 27001

International information security management system requirements and best practice framework.

TS 50701

Railway-specific cybersecurity standard for CBTC and ETCS systems. Critical transport infrastructure.

SOCI Act

Australia’s Security of Critical Infrastructure Act 2018 — compliance for registered critical infrastructure assets.

Sustained Resilience

Security Embedded in OT Engineering.

Cybersecurity is a lifecycle, not a destination. Parasyn integrates security into the standard engineering management workflow — defences that never go stale.

Engineering Change Control

We apply a continuous Assess → Protect → Monitor → Improve loop. Security patches and configuration changes are managed via strict Engineering Change Control to prevent process upsets.

Lifecycle Managed

OT Vulnerability Management

We don’t just scan and pray. We evaluate vulnerabilities against your specific process impact — prioritising remediation of conduits that protect your most critical control logic.

Risk-Prioritised

Sovereign Incident Readiness

Local Australian expertise that understands your site’s specific safe state. We provide the playbook for operational recovery — ensuring the path back to production is fast and validated.

Australian Sovereign

Ready to Secure Your Operations?

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Safety-Assured OT Cybersecurity for Australian Critical Infrastructure