Cyber Security Services for Government and Critical Infrastructure
We help organisations secure what matters most. From strategic guidance to deep technical delivery, Calexi embeds defence-grade cyber security into every layer of your operations.
Speak to our cyber security experts today and take the next step toward compliance, resilience, and assurance.
At Calexi, cyber security is more than protection, it’s about building trust, resilience, and operational confidence. Our secure-by-design approach integrates defence-grade controls across your IT and OT environments, ensuring your systems are not only protected but aligned with Australian government standards such as ISM, PSPF, and the Essential Eight.
We work with clients across Defence, national security, and critical infrastructure to design, build, and accredit high assurance ICT environments. From cyber maturity assessments and vulnerability scanning to strategic remediation roadmaps and executive advisory, we help you proactively manage risk and demonstrate compliance at every step.
Our experienced consultants combine technical depth with mission focus. Whether you’re designing a new network, recovering from legacy risks, or aligning cyber programs with business goals, Calexi brings clarity, precision, and outcomes that hold up in the real world.
Key Service Features
- Defence-grade secure architecture and implementation
- ISM, PSPF, and Essential Eight compliance consulting
- OT and critical infrastructure cyber protection
- Cyber maturity assessments and executive briefings
- Cyber threat detection and continuous monitoring
- Strategic cyber security advisory and governance
- Business and cyber program alignment
- Remediation planning and risk reduction
- Classified network design and accreditation
- Stakeholder engagement and reporting at all levels
Proven Capability in the Field
High Assurance ICT Environment for Defence
Calexi personnel led the full engineering lifecycle of a classified ICT network environment within the Department of Defence. This included requirements development, high and low-level design, security architecture, accreditation, deployment, and operational support. The project met stringent ISM and PSPF requirements and involved ongoing collaboration with allied partners. This work demonstrates our staff’s ability to deliver secure, complex systems in sensitive environments.
High Assurance OT System for Brisbane Olympics Readiness
In partnership with a major stakeholder, Calexi staff contributed to the secure design and delivery of a world-first operational technology solution ahead of the Brisbane Olympics. Our consultants were frequently called upon for critical integration tasks requiring niche expertise, consistently delivering solutions that resolved complex issues under pressure. Their work helped ensure operational readiness and set a new benchmark for OT cyber security integration.
Why Calexi
Calexi is veteran-owned, values-driven, and mission-focused. Our consultants hold Australian security clearances and bring hands-on experience in cyber security, critical infrastructure, and high-assurance system delivery. We understand the regulatory landscape and operate with the discretion, structure, and clarity that Defence and government expect.
What sets us apart is our ability to combine strategic insight with technical delivery, helping you align cyber security with business outcomes, manage compliance risk, and build lasting operational resilience.