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About the Role
The Systems Administrator will maintain and secure the IT infrastructure supporting Firmus’ business operations across regional offices. This role is responsible for the day-to-day administration of servers, network systems, endpoints, cloud services, and enterprise platforms, requiring 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 modernization, security posture improvements, and operational efficiency projects.
Responsibilities
- Serve as the senior technical resource for Firmus corporate IT environment, supporting regional operations across Australia and Singapore, ensuring 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.
- Handle 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 Windows, macOS, and mobile devices using Microsoft Intune.
- Provide senior-level operational support through Jira Service Management (JSM), handling escalations, root-cause analysis, and service improvement actions.
- Monitor infrastructure health and security posture using centralised logging, monitoring, and SIEM platforms, responding to incidents and contributing to threat investigations.
- Contribute to corporate IT improvement initiatives, including system standardisation, security uplift, and operational maturity.
- Develop and maintain high-quality technical documentation, SOPs, and audit evidence to support governance and compliance requirements.
- Mentor junior IT staff and contribute to building a resilient, well-structured Corporate IT function at Firmus.
Requirements
- 5+ years’ experience in a System Administrator / Senior System Administrator role within a corporate, multi-site, or regional IT environment.
- Strong hands-on experience managing corporate IT infrastructure, including servers, endpoints, and virtualisation platforms (VMware, Hyper-V, Proxmox).
- Proven expertise supporting hybrid identity and endpoint environments, including Microsoft 365, Entra ID (Azure AD), Hybrid AD, and Intune.
- Solid understanding of corporate network design, WAN connectivity, and multi-region operations.
- Demonstrated experience maintaining high availability systems, proactive monitoring, and performance optimisation.
- Strong background in endpoint security and threat detection, including hands-on experience with Cortex XDR, MFA enforcement, and security hardening.
- Practical experience with backup and disaster recovery, particularly Veeam, including restore testing and operational readiness.
- Experience working within ITSM frameworks, with hands-on use of Jira Service Management (JSM).
- Strong troubleshooting, analytical, and root-cause analysis skills.
- Effective communicator able to engage with technical and non-technical stakeholders, vendors, and management.
- Experience with vendor coordination is an added advantage.
- Willingness to travel domestically and internationally as required.
Skills
- System Administration
- Hybrid Active Directory
- Cybersecurity Enforcement
- End-user Support
- Servers
- Network Systems
- Endpoints
- Cloud Services
- Enterprise Platforms
- Infrastructure Modernisation
- Security Posture Improvement
- Operational Efficiency
- Windows Server
- Linux Server
- VMware
- Hyper-V
- Proxmox
- Storage Systems
- Microsoft 365
- Entra ID (Azure AD)
- Intune
- Hybrid Active Directory
- Cortex XDR
- MFA
- Vulnerability Management
- Milestone VMS
- Inner Range Access Control
- Veeam
- Slack
- Jira Service Management (JSM)
- SIEM Platforms
- macOS
- Mobile Devices
Location
- Sydney, New South Wales, Australia
Work Type
- Permanent full-time
Experience Level
- 5+ years experience
Education Level
- Degree in Computer Science, Information Technology, or equivalent professional experience
About the Company
- 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.
- We design, build, and operate a new class of digital infrastructure – the AI Factory.
- Our model-to-grid technology approach has pushed the boundaries of multi-generational liquid cooling systems, energy management, AI software orchestration, and construction.
- Firmus AI Cloud is a large-scale GPU cloud platform purpose-built to deliver energy-efficient AI compute at scale.
- It empowers developers, enterprises, educational institutions, and government users to train and deploy AI models with unmatched efficiency and cost savings.
- As an NVIDIA Cloud and Engineering partner in Asia Pacific, you will gain skills, experience, and exposure across the AI industry.
- We are founder-led, not a big corporate, with fast decision-making and minimal bureaucracy.
- Ownership comes early, with a direct line to outcomes and the opportunity to shape business growth.
- Work alongside founders and experts in AI infrastructure, energy systems and next-generation compute.
- 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.
- We are committed to building a diverse and inclusive workplace.
- We encourage applications from candidates of all backgrounds who are passionate about creating a more sustainable future through innovative engineering solutions.
- Join us in our mission to revolutionise the AI industry through sustainable practices and cutting-edge engineering.
Equal Opportunity
- At Firmus, we are committed to building a diverse and inclusive workplace. We encourage applications from candidates of all backgrounds who are passionate about creating a more sustainable future through innovative engineering solutions.