Systems Administrator | 6-month Fixed Term Contract

About Leidos Australia At Leidos Australia, our work goes beyond a job title. We design, build, operate and support the systems, services and capabilities that help protect and advance the Australian way of life. Backed by a global organisation of more than 40,000 people, our Australian team of around 2,000 has partnered with government, defence and national security customers for more than 30 years. We deliver mission-critical solutions where reliability, trust and purpose matter. Leidos is a destination for people who want their work to have purpose, their contribution to be recognised, and their career to grow without needing to fit a single mould. Meaningful work is supported by benefits, flexibility and career pathways that help you grow while balancing life outside work. This includes: Flex Your Way  – Tailor work to your life with options including Life Days (up to 12 extra days off per year), part-time arrangements, job sharing, and compressed hours. Wellbeing That Matters  – Free access to Headspace and MeQuilibrium, plus dedicated wellness spaces to support your mental, physical, and emotional wellbeing. Learn Without Limits  – Access over 120,000 on-demand courses, alongside technical, project management, leadership, and professional development opportunities. Work That Makes an Impact  – Contribute to nationally significant projects that matter, solve complex challenges, and accelerate your career through unique growth opportunities. Build Your Future  – Whether you're deepening technical expertise or preparing for leadership, we'll invest in your development every step of the way. And Much More  – These are just a few of the ways we invest in our people and help them thrive.

You’ll join a team where people work with integrity, inclusion, innovation, agility, collaboration and commitment. In practice, that means sharing ownership, solving complex problems together and staying connected to the customer context, the purpose behind the work and how each role contributes to meaningful outcomes.

This is an opportunity to contribute to the delivery of critical infrastructure projects that support the security, reliability and modernisation of enterprise technology environments. As a Systems Administrator, you will play a key role in implementing and supporting infrastructure solutions across on-premises, cloud and hybrid environments. Build, configure, test and deploy infrastructure solutions across Windows, Unix, Linux, virtualised and cloud platforms, ensuring alignment with project requirements and operational standards. Support major technology initiatives including infrastructure migrations, upgrades, cloud adoption, technology refresh programs and platform modernisation projects. Collaborate with project managers, architects, cybersecurity specialists, vendors and operational teams to deliver secure, resilient and supportable solutions from implementation through to production handover. Contribute to continuous improvement through automation, infrastructure standardisation and operational best practices that enhance efficiency, reduce risk and improve service reliability.

We're looking for an infrastructure professional who enjoys solving technical challenges, delivering quality outcomes and working collaboratively across project and operational teams. You bring a practical approach to systems administration, a focus on security and reliability, and the ability to support infrastructure change in complex enterprise environments. Essential: Experience in systems administration, infrastructure engineering or a similar technical role supporting enterprise environments. Knowledge of Windows, Unix and Linux operating systems, including server provisioning, configuration, patching, upgrades and lifecycle management. Understanding of core infrastructure services including Active Directory, DNS, DHCP, networking, storage, authentication, monitoring, backup and