System Administrator – ICT Infrastructure (Defence)

About the role

IAG Defence & National Security is seeking an experienced System Administrator to support and maintain critical ICT environments within a secure operational setting. The role involves troubleshooting complex technical issues and ensuring reliable performance of both Linux and Windows systems.

Key responsibilities

• Provide Level 1 and Level 2 system administration support across Linux and Windows environments.
• Install, configure, maintain and troubleshoot hardware, software and network infrastructure.
• Support systems to ensure ongoing availability and performance of critical ICT services.
• Perform system monitoring, fault diagnosis, performance tuning and recovery activities.
• Maintain system documentation, configurations and software deployments.

Required profile

• Current NV1 Security Clearance.
• Experience administering Red Hat Linux and Microsoft Windows environments.
• Strong knowledge of network infrastructure, system integration and troubleshooting methodologies.
• Understanding of Information Assurance, cyber security principles and secure ICT operations.
• Excellent communication skills to engage both technical and non‑technical stakeholders.

Required skills

• Red Hat Linux administration
• Microsoft Windows administration
• Network infrastructure
• System integration
• Troubleshooting methodologies
• Information Assurance
• Cyber security principles
• Secure ICT operations

What we offer

• Full‑time onsite role based in ACT or SA.
• Opportunity to support complex Defence and national security programs.
• Collaboration with highly skilled technical and engineering teams.
• Access to a tight‑knit team across multiple Australian offices.