At WorkingMouse, we don’t just build software—we engineer solutions that drive business success. As a fast-growing Brisbane-based tech company, we thrive on solving complex challenges with smart, scalable, and secure technology. To support our continued growth, we’re looking for a Senior Systems Administrator to own and enhance our IT infrastructure. If you enjoy building, securing, and optimising modern IT environments while working in a collaborative and forward-thinking team, we’d love to meet you. What You’ll Be Doing Linux & Windows System Administration – Managing Ubuntu environments and overseeing Windows domain services. Server & Network Management – Keeping our on-prem and virtualised infrastructure running smoothly. Kubernetes (K8s) Operations – Maintaining and improving containerised workloads. IT Asset & Desktop Support – Handling hardware/software management and supporting our internal team. Security & Compliance – Implementing best practices in system security, monitoring, and compliance (ISO27001). If you’re passionate about automation, scalability, and security, you’ll thrive in this role! What We’re Looking For Essential Experience: Linux (Ubuntu) administration Kubernetes (K8s) management On-premises server administration Network operations & troubleshooting Windows domain administration IT asset register & desktop support Highly Regarded Skills: Ansible & Terraform for infrastructure automation Virtualisation with Proxmox & storage management (Ceph) Monitoring with Prometheus & Grafana Device management via Intune ISO27001 security experience AWS or Azure cloud exposure If you’re strong in most of these areas but missing a couple - don’t stress! We value a growth mindset and are happy to upskill the right candidate. Why You’ll Love WorkingMouse Innovative Work – Be part of a company that embraces new technologies and encourages experimentation. Professional Growth – Learn from experienced tech leaders and gain exposure to modern IT practices. Flexibility – Enjoy a hybrid work model that balances remote work with in-office collaboration. Great Location – Work in our Milton office, conveniently located above the train station. Supportive Team Culture – Join a friendly, tight-knit team where your ideas and contributions are valued. Social Perks – Unwind at Friday 'Inspiration Jams' with drinks, discussions, and great company. How to Apply Think you’d be a great fit? We’d love to hear from you! Send your resume to jobs@workingmouse.com.au or apply via this ad. WorkingMouse values diversity and encourages candidates from all backgrounds to apply—even if you don’t meet every requirement listed. Ready to take the next step in your career? Apply today! No Recruitment Agencies Please! We appreciate the work that recruiters do, but we are not accepting applications through third-party agencies at this time. We are focused on building direct relationships with candidates and fostering a strong internal hiring process. Any unsolicited CVs sent to us will not be considered.