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Cyber Security & ICT Engineering in Canberra

We innovate where others won’t

Defence, critical infrastructure, intelligence: high-risk environments need more than paper. We design, remediate, and deliver measurable security improvements without theatre.

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Secure System Design & Remediation

We design, harden, and remediate ICT systems and cyber security environments in Canberra and nationwide. From architecture through to accreditation, our cleared consultants deliver practical fixes that lower risk in Defence, government, and critical infrastructure.

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Cyber Security Engineering including Compliance alignment threat detection, secure by design.
complex end-to-end project management, planning, governance and control. We lower risk through action.

Program Recovery & Delivery Assurance

We reset stalled ICT programs and restore delivery confidence. With Defence ICT and systems engineering expertise, we clarify scope, rebuild governance, and land milestones your executives can prove.

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Operational Technology & Critical Infrastructure Security

We help national infrastructure providers achieve SOCI Act compliance and strengthen their OT environments without disruption. Our team applies network segmentation, security uplift, and risk management across leading frameworks (Essential Eight, ISM, ISO, and NIST) to deliver actionable risk reduction balanced with operational needs.

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Critical infrastructure security — SOCI compliance, network segmentation, uplifting cyber security without downtime.
Governance, risk and compliance uplift — ISM, Essential Eight, ISO, NIST frameworks, practical security remediation.

GRC & Essential Eight Uplift

In 45 days we map your organisation’s real posture, then drive uplift across Essential Eight, PSPF, and ISM compliance. Our evidence-based approach combines cyber risk management, governance and audit-ready consulting, delivering measurable results and Authority to Operate (ATO).

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Why Calexi: Cleared Cyber Security Specialists

Cleared cyber security specialists with strong Defence experience and end-to-end operations delivery.

Measurable Risk Reduction

Lowered Defence program risks from extreme to medium within six months through targeted cyber risk remediation.

Cleared cyber security specialists with strong Defence experience and end-to-end operations delivery.

Proven Compliance Uplift

Delivered a 30%+ Essential Eight compliance increase in under six months, securing Authority to Operate (ATO).

Cleared cyber security specialists with strong Defence experience and end-to-end operations delivery.

Ground Truth in 45 Days

Cleared consultants provide a full ICT security assessment and practical roadmap for remediation.

Featured Work: Measurable Risk Reduction & Compliance Uplift

  • cyber lights and padlock as well as a handshake of trust

    ASX Hybrid Cloud

    An ASX-listed critical infrastructure company faced major risks from an aging, non-compliant ICT environment. Calexi staff delivered a hybrid cloud transformation during COVID-19, enabling 100%…

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  • Abstract cyber security illustration with a glowing shield overlaying a digital network grid, symbolising Defence cyber resilience and secure network remediation.

    Defence Cyber Training Environment

    Calexi led the rapid redesign and remediation of a critical Defence cyber training environment, reducing risk levels, lifting Essential Eight compliance by more than 30%,…

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  • A glowing digital shield with a central padlock symbol, surrounded by eight evenly spaced turquoise-blue nodes connected in a circular pattern. The background features a dark blue gradient with subtle circuit lines, symbolizing cyber security, Essential Eight compliance, and Defence-level protection.

    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…

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Ready to Reduce Risk?

As trusted by Defence, Government and Critical Infrastructure providers.

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