ABOUT AC3

At AC3, we don’t just run infrastructure, we humanise technology. Our mission is to cut through complexity and deliver real outcomes that empower Australia’s most critical organisations. We’re growing our Site Reliability team and looking for a Linux (RHEL) Systems Administrator who wants to do more than just keep the lights on. If you’re passionate about automation, resilience, and problem solving, this is your chance to join a company that sits at the heart of Australia’s secure digital transformation.

THE ROLE

As a Platforms Engineer Site Reliability (Linux), you’ll be a key player in keeping AC3’s on-prem infrastructure running at peak performance. You’ll lead on RHEL administration, drive automation, and support authentication and monitoring systems that keep our platforms secure and reliable. This role requires you to be an Australian Citizen and hold (or be eligible for) Baseline Security Clearance.

KEY RESPONSIBILITIES

• Manage and optimise AC3’s Linux (RHEL) platform fleet, provisioning, patching, configuration, and troubleshooting.
• Automate Linux platform tasks with Ansible, Puppet, Bash, or Python.
• Monitor and maintain critical infrastructure with >99.99% availability.
• Collaborate with peers across Platforms, Cloud, and Security teams.
• Participate in on-call rotations for Linux services and platform escalations.