Secure ICT Networking Solutions for Government and Industry
Calexi designs, deploys and maintains high-assurance networks. Built for performance, visibility and compliance.
Book a consult to improve network security, performance and resilience across your ICT environment.
Your network is the backbone of your organisation. At Calexi, we design and deliver secure network solutions that enable performance and protect what matters most. Our team architects secure network topologies, defines VLAN structures, configures firewall policies, and implements encrypted tunnels across sites, cloud environments and operational technology networks.
We conduct in-depth network architecture reviews to identify risks and optimise flow. Our team supports firewall management, intrusion detection and prevention systems, and continuous monitoring to ensure your infrastructure is responsive, resilient and secure.
Ideal for high-assurance environments including Defence, national security, and regulated sectors, our networking services are tailored to align with compliance requirements such as the ISM and PSPF. Whether you’re building from scratch, scaling up, or reviewing security posture, Calexi provides reliable, secure networking solutions with assurance built in.
Key Service Features
- Secure network architecture design and reviews
- VLAN segmentation and policy definition
- Firewall rule management and tuning
- Intrusion detection and prevention systems (IDS/IPS)
- Encrypted VPN and inter-site tunnel deployment
- Hybrid cloud and on-prem network integration
- OT network security for critical infrastructure
- Network performance optimisation and tuning
- Continuous monitoring and capacity planning
- Compliance-aligned network documentation
Proven Capability in the Field
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Building a Sovereign Cyber Training Capability for Defence
Defence faced mounting challenges in building a skilled cyber workforce, from costly overseas training to critical skills gaps. Calexi staff designed and delivered a sovereign training program that equipped over 300 personnel, including 30+ incident responders, while saving more than $2M and creating a sustainable pipeline of skilled SOC operators.
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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%, and enabling the successful completion of a multinational exercise. Our secure-by-design approach delivered measurable, sustainable improvements under tight time and compliance pressures.
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Cyber Induction Course for Defence & Government
We designed and delivered a cyber induction course tailored for Defence and government staff, training over 300 participants across five departments. Our hands-on, practical approach bridged skill gaps, improved awareness, and built a consistent baseline of cyber security understanding across diverse audiences.
Why Calexi
Calexi is a trusted partner for Defence, government and regulated industry clients who require secure, reliable ICT infrastructure. Our consultants bring hands-on experience across enterprise and OT networks, with a focus on compliance, performance and real-world resilience.
We operate with structure, discretion, and clarity. Ensuring networks are not only built right, but remain visible, auditable, and ready to support future needs. Whether you need design support, security reviews, or end-to-end management, Calexi delivers networking solutions you can depend on.