Cyber Security & ICT Engineering Services
Secure. Compliant. Mission-Ready.
Calexi delivers high-assurance ICT and cyber security services tailored to Defence, government, and critical infrastructure. Our consultants combine technical depth with real-world operational experience to design, harden, and remediate systems that stand up to scrutiny — from accreditation audits to live adversaries.
Featured Services
🔐 Cyber Security
Hardened systems that meet compliance and withstand attack.
From Essential Eight uplift through to secure-by-design architecture, we deliver practical solutions that reduce risk without adding unnecessary overhead. Our consultants are cleared, accredited, and experienced in uplifting environments to ISM, PSPF, DISP and international standards.
- Risk assessments and secure architecture
- Vulnerability detection and remediation
- Accreditation and compliance support
- Incident response readiness
⚙️ ICT Engineering
Build systems that pass accreditation the first time.
We engineer ICT environments that are reliable, secure, and fit-for-purpose. Whether modernising networks, migrating workloads, or integrating Defence-grade systems, we balance compliance with operational performance.
- Secure network and server design
- Cloud and on-prem integration
- Compliance-ready builds (ISM, PSPF, DSPF, Essential 8, ISO27001)
- Full lifecycle engineering: assess → design → implement → assure
🏭 Operational Technology (OT) Security
Protect the systems that keep the lights on.
Operational Technology (OT) environments demand specialised protection. We help critical infrastructure operators secure SCADA, industrial controls, and field systems against disruption and cyber threats — without impacting reliability or safety.
- Risk analysis for OT and SCADA
- Network segmentation and isolation
- Threat detection and monitoring
- Compliance with SOCI, ISM, and industry standards
Our Method: Continuous Improvement
Every Calexi engagement follows a structured, repeatable cycle — Assess, Design, Implement, Assure & Evolve — ensuring systems remain secure, compliant, and mission-ready over time.
Supporting Capabilities
Beyond our core services, Calexi provides a full suite of ICT and security support to help organisations stay resilient and mission-ready.
Cloud Solutions – Secure migrations, hybrid integration, and sovereignty-aligned architectures.
Networking & Infrastructure – Design, deployment, and hardening of LAN/WAN, wireless, and secure gateways.
Governance, Risk & Compliance – Policy frameworks, DISP preparation, audits, and executive briefings.
Systems Administration – Proactive, secure management of servers, networks, and users for stable operations.
Systems Engineering and Integration Services – Design and integration of complex ICT systems for mission-readiness.
Project Management and Recovery – Delivery of projects on time, or recovery of those at risk.
Technology Development and Innovation – Prototyping and emerging tech solutions for a decisive edge.
DISP & Essential Eight Uplift – Cost-effective Defence DISP and Essential Eight compliance uplift for Australian SMEs.
Training & Development – Tailored workforce uplift, Essential Eight training, and cyber awareness programs.
Business Continuity & Disaster Recovery – Planning, testing, and resilience engineering for mission-critical environments.
Why Calexi
- Security-Cleared Experts – Our consultants hold NV1/NV2 clearances and deep Defence sector experience.
- Practical Outcomes – We cut through red tape to deliver solutions that actually work in the field.
- Compliance Built-In – Every engagement is designed with ISM, PSPF, Essential Eight, and SOCI in mind.
- Trusted By Government & Industry – Defence, intelligence, and critical infrastructure clients across Australia.
Ready to strengthen your systems?
Partner with Calexi to design, secure, and assure your ICT and OT environments.