Senior Systems Administrator — Global IT & Security Lead

Firmus; Sydney; On-site; AUD 100,000 - 140,000; Full time

Job summary

Firmus Technologies seeks a Senior System Administrator to sustain and secure our regional IT infrastructure across Australia and Singapore. You will manage servers, endpoints, and cloud services, and contribute to security posture and operational efficiency.

You will lead identity and endpoint management, backup and DR, and collaborate with vendors and internal teams. This is a permanent full‑time role requiring hands‑on expertise and travel as needed.

Qualifications

• 5+ years in a System Administrator role in corporate, multi-site environments.
• Degree in Computer Science or IT, or equivalent.
• Hands-on experience with servers, endpoints, and virtualization.
• Experience with hybrid identity and endpoint management (M365, Entra ID, Azure AD, Intune).
• Willingness to travel domestically and internationally.

Responsibilities

• Maintain IT infrastructure across regional offices with focus on security.
• Administer Windows and Linux servers, virtualization platforms and storage.
• Design and operate identity, access, and endpoint management.
• Lead endpoint security and vulnerability management activities.
• Manage backup, DR with Veeam and run restore testing.
• Handle onboarding/offboarding, licenses, and audits.
• Develop documentation, SOPs, and governance artifacts.

Skills

System administration

Hybrid AD & Intune

Security hardening

Vendor coordination

Troubleshooting

Effective communication

Education

Degree in Computer Science / IT

Equivalent professional experience

Tools

VMware

Hyper‑V

Proxmox

Microsoft 365

Entra ID (Azure AD)

Intune

Jira Service Management

Veeam

Milestone VMS

Inner Range

Slack

Job description

Firmus Technologies seeks a Senior System Administrator to sustain and secure our regional IT infrastructure across Australia and Singapore. You will manage servers, endpoints, and cloud services, and contribute to security posture and operational efficiency.

You will lead identity and endpoint management, backup and DR, and collaborate with vendors and internal teams. This is a permanent full‑time role requiring hands‑on expertise and travel as needed.