Senior Systems Administrator – Melbourne

About the role

DCA is looking for an experienced Senior Systems Administrator to join its Melbourne CBD office. You will work on a broad range of technologies, from public cloud to private hypervisors, databases, identity, endpoint security and the networks that connect them.

Key responsibilities

• Own day‑to‑day operation, performance and security of Windows, Linux, virtualisation and cloud estates.
• Optimise Azure infrastructure and Entra ID identity services.
• Administer private‑cloud hypervisors and the underlying storage, compute and networking.
• Maintain SQL Server and Oracle databases – backup, patch, performance tuning.
• Operate the M365 tenant (Exchange Online, Teams, SharePoint, Intune, Purview) to a high standard.
• Collaborate with security teams to implement operational security controls and respond to alerts.
• Drive automation, monitoring, documentation and incident response processes.

Required profile

• Minimum 5 years of systems administration experience.
• Comfortable working with PowerShell, Azure portal, vCenter/Hyper‑V and SQL query tools.
• Strong communication skills with engineers, security and business stakeholders.
• Proactive documentation habit and calm under escalation.
• Australian citizenship, permanent residency or valid work permit; driver’s licence beneficial.

Required skills

• Windows Server
• Linux
• Azure & Entra ID
• vCenter / Hyper‑V
• SQL Server
• Oracle Database
• PowerShell
• M365 (Exchange Online, Teams, SharePoint, Intune, Purview)
• Automation and monitoring tools
• Incident response and security controls

What we offer

• Market‑competitive salary.
• Rewarding career progression and project‑based experience.
• Professional work environment with autonomy to shape standards.
• Modern head‑office location in Melbourne CBD.