Systems Administrator

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.

About the Team

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.

We deliver prime systems integration projects which build, develop and support military solutions for Defence. The team focuses on leveraging our local engineering, our services expertise, and global products to bring new capabilities to the Australian Defence Force.

The Opportunity

As a Systems Administrator, you will play a key role in supporting a strategically important Defence capability that delivers technical staffing and specialist expertise across three interconnected Tactical Data Link (TDL) and network engineering projects. Supporting Joint Command and Control (JC2) and Joint Data Network (JDN) environments, you will contribute to the delivery of critical testing, interoperability, accreditation, and network design activities that enable Defence operational effectiveness.

• Support and administer enterprise Windows Server, Linux, virtualisation, and VDI environments that underpin Tactical Data Link, platform, and software testing activities across a multi-project Defence program.
• Maintain and enhance critical infrastructure technologies including Active Directory, VMware ESX, Hyper-V, Omnissia Horizon, Citrix Virtual Apps and Desktops, storage, backup, and recovery solutions to ensure secure, reliable, and resilient service delivery.
• Collaborate with Defence stakeholders, technical specialists, vendors, and project teams to support TDL interoperability requirements, Joint Data Network capabilities, Link 16 network design activities, and ongoing technology refresh and continuous improvement initiatives.
• Contribute to infrastructure projects, disaster recovery exercises, cyber security compliance activities, and operational support functions while working within a highly secure environment aligned to Whole of Australian Government ICT security requirements and Defence accreditation frameworks.

About You

We are looking for a technology professional who enjoys working in secure and complex ICT environments where reliability, collaboration, and technical expertise directly contribute to Defence capability outcomes. You will bring a customer-focused approach, sound systems administration experience, and the ability to work across a diverse technology landscape supporting mission-critical networks and services.

Essential

• Experience supporting and administering Microsoft Windows Server and Linux environments within complex enterprise ICT environments.
• Knowledge of Active Directory, Group Policy, DNS, DHCP, and multi-domain environments, including administration, maintenance, and troubleshooting.
• Experience maintaining and supporting enterprise server, desktop, and infrastructure platforms within medium to large organisations.
• Capability in administering and supporting Microsoft Hyper-V and VMware ESX environments, including virtual machine provisioning, lifecycle management, and troubleshooting.
• Experience supporting Omnissia Horizon, Citrix Virtual Apps and Desktops, or similar virtual desktop infrastructure technologies.
• Experience with enterprise storage, backup, and recovery solutions, ideally including NetApp storage and Veeam Backup & Replication.
• Demonstrated analytical and problem-solving capability, with the ability to diagnose and resolve complex technical issues across infrastructure, virtualisation, and end-user computing environments.
• Well-developed written and verbal communication skills, with the ability to engage effectively with customers, technical teams, and Defence stakeholders.
• Understanding of Whole of Australian Government ICT security requirements, ACSC Information Security Manual (ISM) controls, cyber assurance frameworks, and secure operating environments.
• Ability to work independently while contributing effectively within a multidisciplinary team supporting multiple projects and competing priorities.

Advantageous

• Experience with containerisation technologies, including Docker and container management platforms.
• Capability in PowerShell scripting and automation to improve operational efficiency and reduce manual administration activities.
• Knowledge of thin client technologies and virtual desktop environments.
• Familiarity with Microsoft Endpoint Configuration Manager (MECM/SCCM) or related endpoint management solutions.
• Understanding of networking concepts including TCP/IP, VLANs, VPNs, routing, switching, firewall technologies, and secure network operations.
• Exposure to Tactical Data Link, Defence networking, interoperability testing, systems integration, or secure communications environments.
• ITIL Foundation certification or a comparable IT Service Management qualification.
• Microsoft certifications such as Windows Server Hybrid Administrator Associate, Azure Administrator Associate, or equivalent.
• Citrix Certified Associate (CCA) certification or a higher-level Citrix accreditation.

This position requires a minimumNV2 Security Clearance.

What to Expect When You Apply

Our hiring process is designed to be straightforward, respectful and easy to navigate. If your skills, experience and qualifications look aligned with the role, our Talent Acquisition team will contact you to discuss the next stage. You can expect:

• An initial conversation with our Talent Acquisition team
• An interview with the hiring manager or interview panel
• Any role-specific assessment, technical discussion or customer step required for the position

We’ll let you know what to expect before each stage, including who you’ll meet and how to prepare. If you need any adjustments or support during the process, please let us know.

Ready to explore what’s possible?

If this sounds like a role where you can make an impact and continue to grow, we’d like to hear from you. Please apply via the “Apply Now” button with your resume. If you have any questions about the role or recruitment process, please contact Ben George, Talent Acquisition.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.