Operational Technology (OT) Security Services
Calexi protects critical infrastructure with proven OT cyber defences that secure uptime, safety and compliance.
Secure your industrial control systems. Talk to Calexi about OT cyber uplift today.
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.
Key Service Features
- 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
Proven Capability in the Field
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Critical Infrastructure Project Remediation
A transport critical infrastructure project was at risk due to cascading system failures caused by poor maintenance in a high-security environment. Calexi rapidly stabilised the systems in 2 weeks, reduced the risk profile from very high to medium, recommenced commissioning, and delivered a comprehensive maintenance plan with strong stakeholder confidence.
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DISP – Defence Industry Security Program Uplift
A Defence SME needed DISP compliance but faced limited resources and low security maturity. Calexi delivered a full uplift within 6 months, achieving Maturity Level 2, Defence approval, and cost savings all while improving security culture and posture.
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Critical Infrastructure Uplift
A transport-sector organisation faced compliance gaps and conflicting advice. Calexi identified redundant technology, leveraged existing licences, and implemented targeted improvements, saving hundreds of thousands while delivering major security and compliance uplifts — without disrupting critical operations.
Why Calexi
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.