Senior Systems Administrator - Hybrid IT & Security

Firmus Technologies Pty Ltd.; Sydney; On-site; AUD 90,000 - 130,000; Full time

Job summary

Firmus Technologies seeks a Systems Administrator to maintain and secure the IT infrastructure that supports our regional operations in Australia and Singapore. You will manage servers, network services, cloud platforms, and endpoints, reporting to the CTO.

The role requires hands-on expertise in hybrid Active Directory, cybersecurity enforcement, identity and endpoint management, and IT onboarding/offboarding. You will collaborate with vendors and internal teams to drive security and efficiency.

Qualifications

• Hands-on system administration experience (Windows and Linux).
• Experience with identity, access, and endpoint management.
• Strong cybersecurity enforcement and incident response skills.

Responsibilities

• Senior technical for Firmus corporate IT environment, supporting regional operations across Australia and Singapore, with accountability for stability, security, and continuous improvement.
• Administer and maintain corporate infrastructure and platforms, including Windows and Linux servers, virtualisation platforms (VMware, Hyper‑V, Proxmox), storage systems, and core corporate services.
• Design, implement, and operate identity, access, and endpoint management across the organisation using Microsoft 365, Entra ID (Azure AD), Intune, and Hybrid Active Directory, ensuring consistent security baselines and least‑privilege access.
• Own and continuously improve endpoint security and threat detection, leveraging Cortex XDR, MFA, and vulnerability management practices in alignment with Firmus security standards.
• Support and maintain corporate security systems, including Milestone VMS and Inner Range access control, ensuring reliable and secure physical access operations.
• Manage backup, recovery, and disaster recovery operations using Veeam, including regular monitoring, restore testing, and validation of recovery readiness.
• IT onboarding and offboarding for corporate staff, covering account provisioning, device issuance and recovery, access reviews, and audit readiness.
• Administer corporate collaboration platforms (e.g. Slack), including user lifecycle management, integrations, and policy enforcement.
• Maintain accurate corporate IT asset registers and ensure software licensing compliance and renewals (e.g. Microsoft, Adobe, Autodesk), including new purchases and vendor coordination.

Tools

VMware

Hyper-V

Proxmox

Veeam

Job description

Firmus Technologies seeks a Systems Administrator to maintain and secure the IT infrastructure that supports our regional operations in Australia and Singapore. You will manage servers, network services, cloud platforms, and endpoints, reporting to the CTO.

The role requires hands-on expertise in hybrid Active Directory, cybersecurity enforcement, identity and endpoint management, and IT onboarding/offboarding. You will collaborate with vendors and internal teams to drive security and efficiency.