Network Administrator

Job description

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. The Mission Software Solutions business delivers customized and off-the-shelf software solutions to Defence, Intelligence and other Government sectors. The business also builds capabilities that can be used for a wide range of applications in both traditional and non-traditional environments; providing leadership in the advancement of technological modernisation of complex enterprises within Government. The Opportunity Leidos Australia is seeking multiple experienced Network Administrators to join our GEOSPACES program, supporting advanced national security technology in a secure, high-compliance government environment. You’ll help keep mission-essential network services available, secure and performing reliably. In this role, you will: Manage and maintain network infrastructure, including switches, routers, firewalls and wireless access points, supporting the availability and performance of critical data and voice networks. Provide Level 2 and Level 3 incident response, troubleshooting complex network and connectivity issues and restoring services with minimal operational disruption. Implement and maintain network security controls, including firewall policies and monitoring, to protect services from unauthorised access and cyber threats. Configure network devices, monitor performance and capacity, identify opportunities for optimisation, and maintain accurate network topology, configuration and procedural documentation. About You You’ll bring practical network administration experience and the technical capability to troubleshoot and maintain enterprise networks in a secure operational environment. Essential: Experience with networking fundamentals including TCP/IP, DNS, DHCP, VLANs and routing protocols such as OSPF and BGP. Hands-on experience administering enterprise networking technologies such as Cisco, Juniper, Palo Alto or Fortinet. Experience managing and troubleshooting firewalls, network security devices and associated security policies. Capability in diagnosing and resolving complex network issues using network analysis and monitoring tools such as Wireshark or SolarWinds. Ability to maintain clear and accurate technical documentation covering network configurations, topology and operational procedures. Advantageous: Experience providing Level 2 or Level 3 support within complex, secure or high-availability network environments. Experience supporting network performance monitoring, capacity management and optimisation activities. You don’t need to meet every criterion. If your experience aligns with most of what we’re looking for, we encourage you to apply. Due to the nature of the role, you must be an Australian Citizen who holds an active TSPV security clearance; accompanied by the ability to be successful for a DISA/OSA. Certain roles may be subject International Traffic in Arms Regulations (ITAR) requirements which may limit persons who hold dual nationality with certain proscribed countries from accessing material, or in the case of dual Australian-U.S citizens, may require the candidate to obtain a U.S. Persons Abroad authorisation from the U.S DDTC. 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.