Senior Systems Administrator - ICT Infrastructure & Cybersecurity

About the role

A growing Australian Defence industry organisation with about 45 people is looking for a Senior Systems Administrator (L1 to L4) in Port Melbourne, Victoria. As the sole systems administrator, you will cover infrastructure, Microsoft 365, cloud administration and cybersecurity, supporting software engineers, technicians, technical authors, analysts and team leaders. The role is permanent and full-time, hybrid with three days onsite, and requires Australian citizenship.

Key responsibilities

• Own infrastructure, Microsoft 365, cloud and cybersecurity operations
• Strengthen Essential Eight ML2 maturity and support ISM compliance across the organisation
• Drive improvements, implement security initiatives and act as the go-to person for infrastructure and security operations

Required profile

• 5+ years in systems administration or infrastructure engineering
• Strong Microsoft infrastructure and cloud experience
• Practical cybersecurity and Essential Eight knowledge
• Australian citizenship (PR or other visas are not eligible due to defence security clearance requirements)

Required skills

• Windows Server, Active Directory, Group Policy
• Microsoft 365, Entra ID, Exchange Online, SharePoint, Intune, Autopilot, Defender, Sentinel and Purview
• Hyper-V, SQL Server, backup and disaster recovery
• PowerShell scripting and automation
• Networking, firewalls, VPNs, endpoint management, system hardening and vulnerability management

What we offer

• Salary of $110-$120k including superannuation, flexible for the right candidate
• Hybrid arrangement with three days onsite and free onsite parking
• Supportive small-team culture within a large global parent company