Managed ICT Systems Administration for Government and Business
Calexi delivers reliable, secure ICT support across Windows, Linux, cloud and on-prem environments. Allowing you to focus on your mission.
Contact our team to streamline ICT operations, reduce risk and maintain assurance across your infrastructure.
Reliable ICT operations are essential to business continuity and compliance. At Calexi, we provide fully managed systems administration services across cloud, on-prem, and hybrid environments. With a strong focus on availability, repeatability and alignment to Defence and government standards.
Our team supports Windows and Linux environments, conducts patching and updates, manages backups and restores, and tunes performance for consistent service delivery. We document configurations, maintain operational runbooks, and ensure repeatable outcomes across platforms.
We are experienced in operating under ITIL-aligned frameworks and have worked across Microsoft, Atlassian, and other enterprise service ecosystems. Whether you’re seeking outsourced support or embedded capability, Calexi brings the consistency, security, and situational awareness required in high-assurance environments.
Key Service Features
- Windows and Linux systems administration
- Managed cloud and on-prem infrastructure
- Patch management and software updates
- Backup and disaster recovery configuration
- Incident response and troubleshooting
- Runbook documentation and change control
- DISP-aligned ICT support for Defence clients
- System performance tuning and optimisation
- ITIL-based service management workflows
- Microsoft 365 and Atlassian integration
Proven Capability in the Field
-
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% remote work, achieving E8 compliance in under a month, and ensuring no staff layoffs while strengthening security and scalability.
-
SME Essential Eight Compliance
A Defence industry SME required Essential Eight compliance to execute a Defence contract. Calexi delivered a full uplift in just four weeks, achieving ML1 across all areas, ML3 in key controls, and DISP membership within 3 months — reducing risk from very high to low/medium.
-
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.
Why Calexi
Calexi combines deep technical expertise with disciplined operations management to keep your systems secure, available and compliant. Our consultants hold Defence-relevant clearances and bring first hand experience in managing complex ICT environments for public sector, Defence and critical infrastructure clients.
We don’t just fix issues, we prevent them. Our approach is proactive, documented and aligned with your assurance goals. From ITIL workflows to vendor platform integrations, Calexi delivers ICT systems administration that you can trust.