Linux Systems Administrator

Leidos LLC; North Canberra; On-site; AUD 110,000 - 150,000; Full time

Job summary

Leidos Australia is seeking a Linux Administrator to maintain and enhance the Linux infrastructure that supports critical operations in a highly secure environment. You will provide Level 2 and Level 3 support across enterprise Linux platforms and help optimise system availability, performance and security.

Responsibilities include deploying and maintaining virtualization (VMware/ KVM), managing authentication services, and automating configuration via Ansible, Puppet or Chef while ensuring

Qualifications

• Essential Experience administering enterprise Linux environments, including distributions such as RHEL/CentOS, Ubuntu and SUSE.
• Capability in managing user access, authentication and directory services, including LDAP-based solutions such as OpenLDAP.
• Experience with configuration management and automation tools including Ansible, Puppet or Chef.
• Knowledge of virtualisation technologies, including VMware ESXi/vSphere, KVM or similar platforms.
• Experience providing Level 2 and/or Level 3 support, with the ability to troubleshoot and resolve complex infrastructure issues.
• Experience implementing and maintaining security controls, system hardening practices and operational compliance requirements.
• Capability in scripting and automation using Bash, Python, Perl or similar technologies.

Responsibilities

• Provide Level 2 and Level 3 support across enterprise Linux environments, ensuring availability, performance and reliability of critical systems.
• Develop, automate and standardise system configurations using tools such as Ansible, Puppet and Chef.
• Support security and access management requirements through the administration of authentication services and automation of routine tasks.

Skills

RHEL/CentOS

Ubuntu

SUSE

OpenLDAP

Ansible

Puppet

Chef

VMware ESXi/vSphere

KVM

Bash

Python

Perl

Security controls

Automation scripting

Tools

HP OneView

HPE GreenLake

VMware ESXi/vSphere

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

The Software Solutions business delivers customised 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.

Opportunity

Join Leidos Australia’s AGO GEO SPACES program and contribute to the delivery of advanced national security capabilities in a highly secure, mission-critical environment. As a Linux Administrator, you will play a key role in maintaining and enhancing the Linux infrastructure that supports essential operational outcomes, working alongside experienced engineers and technology specialists. Provide Level 2 and Level 3 support across enterprise Linux environments, ensuring the availability, performance and reliability of critical systems and services. Administer and maintain virtualised and physical infrastructure, including VMware, KVM, HP OneView and GreenLake platforms, while supporting ongoing system optimisation and lifecycle activities. Develop, automate and standardise system configurations using tools such as Ansible, Puppet and Chef, with a focus on operational efficiency, consistency and compliance. Support security and access management requirements through the administration of authentication services, implementation of security controls and automation of routine administration tasks using scripting technologies.

About You

You are a Linux systems professional who enjoys solving complex technical challenges and working within a secure, high-assurance environment. You bring experience across enterprise infrastructure technologies and are committed to maintaining stable, secure and well-managed platforms that enable critical business and operational outcomes.

• Essential Experience administering enterprise Linux environments, including distributions such as RHEL, CentOS, Ubuntu and SUSE.


• Capability in managing user access, authentication and directory services, including LDAP-based solutions such as OpenLDAP.


• Experience with configuration management and automation tools including Ansible, Puppet or Chef.


• Knowledge of virtualisation technologies, including VMware ESXi/vSphere, KVM or similar platforms.


• Experience providing Level 2 and/or Level 3 support, with the ability to troubleshoot and resolve complex infrastructure issues.


• Experience implementing and maintaining security controls, system hardening practices and operational compliance requirements.


• Capability in scripting and automation using Bash, Python, Perl or similar technologies.

Advantageous Experience

• Experience supporting large-scale, mission-critical or highly regulated environments.


• Familiarity with Kickstart or similar operating system deployment and Standard Operating Environment (SOE) management practices.


• Exposure to HP OneView, GreenLake or comparable enterprise infrastructure management platforms.

Due to the nature of this role, you must be an Australian Citizen and hold an active TSPV security clearance, with the ability to be successful for a DISA/OSA.

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.

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.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment‑related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment‑related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.