Operational Technology (OT) Security Services

Calexi helps government and industry clients protect Operational Technology (OT) systems from evolving cyber threats. From segmentation and protocol filtering to remote access hardening and integrity monitoring, we provide end‑to‑end OT security aligned with compliance frameworks and safety standards.

We assess and secure industrial control systems, SCADA environments, and legacy OT infrastructure. Our team configures secure remote gateways, applies encryption to network traffic, and ensures that updates or changes never introduce unmanaged risk.

We also integrate OT assets into SIEM platforms and implement continuous integrity checking — allowing you to detect anomalies early and respond decisively. With Calexi, you get a continuous assurance model that protects both operations and compliance outcomes in the environments that matter most.

• OT network segmentation and protocol filtering
• SIEM onboarding and telemetry integration
• Secure remote access and encrypted gateways
• End-to-end encryption across OT networks
• Industrial asset discovery and risk assessment

• Compliance-aligned OT security architecture
• Periodic integrity checks and baseline validation
• Threat mitigation for SCADA and control systems
• Critical infrastructure cyber uplift programs
• Continuous assurance for updates and change

Critical Infrastructure Uplift Across Australia

Calexi staff supported a large federal government department in uplifting critical infrastructure cyber security nationwide. Working with major operators across sectors, our consultants conducted rapid assessments and remediation activities that significantly improved OT security posture. The project delivered real-world risk reduction for essential services, supporting both public safety and national resilience. This experience highlights Calexi’s deep capability in OT threat mitigation and cyber uplift.

World‑First OT Integration for Brisbane Olympics Preparation

In partnership with a key organisation, Calexi staff contributed to the security-by-design and development of a groundbreaking Operational Technology system in support of the Brisbane Olympics. Our consultants were brought in to solve complex integration and configuration challenges that had not previously been addressed in the field. Their ability to rapidly deliver secure, high-quality outcomes under pressure earned recognition from both project stakeholders and end users. This experience reflects Calexi’s depth in OT system development and real-time problem solving in high-assurance environments.

Calexi understands the unique demands of Operational Technology environments, where security must not disrupt uptime or safety. Our consultants have worked across Defence, government and critical infrastructure, delivering trusted uplift programs that improve visibility, reduce attack surface and maintain compliance.

We combine field-tested techniques with structured delivery. supporting both legacy OT and emerging technologies with equal discipline. If your industrial systems are due for uplift, Calexi offers the clarity, assurance and execution needed to protect what matters most.