Systems Administrator

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

Firmus Technologies is a global leader pioneering the development and operation of efficient AI infrastructure across Asia Pacific.

Founded in Australia in 2019, our mission is to create the most efficient AI infrastructure by combining cutting‑edge technology with a steadfast commitment to sustainability.

At Firmus, we are unique in our approach. We design, build, and operate a new class of digital infrastructure - the AI Factory. Through our model‑to‑grid technology approach, we have pushed the boundaries of multi‑generational liquid cooling systems, energy management, AI software orchestration, and construction. For our customers, this approach allows us to make every watt count and deliver low‑cost AI tokens globally.

Firmus AI Cloud

Our large‑scale GPU cloud platform, Firmus AI Cloud, is purpose‑built to deliver energy‑efficient AI compute at scale to customers.

It empowers developers, enterprises, educational institutions, and government users to train and deploy AI models with unmatched efficiency and cost savings. With an ever‑growing suite of services and applications, we are committed to delivering a cloud experience that is market‑leading, proprietary, and built to scale.

Why Firmus?

As an NVIDIA Cloud and Engineering partner in Asia Pacific, you will gain skills, experience, and exposure across the AI industry and be part of shaping what this industry looks like for decades to come.

We are founder‑led, not a big corporate. Decisions happen fast, our leaders are accessible, and there's minimum bureaucracy between you and the work. Ownership comes early. Whatever your role, you will have a direct line to outcomes, helping shape how the business grows as we scale nationally across a long‑term, large‑scale roadmap.

Work alongside founders and experts in AI infrastructure, energy systems and next‑generation compute.

What we build here has impact beyond the business. Our AI Factories are designed to operate as assets to the energy grid to actively strengthen the communities and regions they operate in rather than drawing from them.

Considering applying? You don't need a perfect background to join our team. If you're driven and curious, there's a path for you. We back our people to grow into new domains and take on challenges beyond their previous experience.

Role Summary

The Systems Administrator plays a critical role in maintaining and securing the IT infrastructure that supports Firmus' business operations across regional offices. Reporting directly to the Chief Technology Officer (CTO), this position is responsible for the day‑to‑day administration of servers, network systems, endpoints, cloud services, and enterprise platforms. The role requires a strong hands‑on background in system administration, hybrid Active Directory environments, cybersecurity enforcement, and end‑user support. The Systems Administrator also contributes to strategic technology initiatives, including infrastructure modernisation, security posture improvements, and operational efficiency projects. This position demands a proactive, detail‑oriented individual with the ability to manage complex systems, provide high‑quality support, and collaborate effectively across departments and with external vendors.

Key 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.
• Enforce endpoint compliance, configuration standards, and application controls across Wind