Senior Infrastructure Engineer | Linux/Unix

Leidos; City of Knox; On-site; AUD 140,000 - 190,000; Full time

Job summary

Leidos Australia is seeking a Senior Unix Engineer to lead admin, optimization and modernization of enterprise Unix/Linux platforms supporting critical government services across on-prem, cloud and hybrid environments.

You will drive automation with Shell scripting, Python, Ansible and Terraform; mentor engineers and collaborate with security, networking and application teams to ensure resilience, disaster recovery and high availability.

Qualifications

• Significant experience in Unix/Linux systems administration or engineering within large-scale enterprise environments.
• Advanced knowledge of Unix/Linux operating system architecture, administration, performance tuning, troubleshooting, and capacity management.
• Experience managing operating system patching, upgrades, lifecycle management, vulnerability remediation, and security hardening activities.
• Capability in Shell scripting and automation, with experience using tools such as Python, Ansible, Terraform, or equivalent technologies.
• Knowledge of storage technologies including LVM, SAN, NAS, and enterprise file systems.
• Experience supporting high-availability, clustering, backup, recovery, and disaster recovery solutions.
• Understanding of TCP/IP networking, DNS, SSH, HTTP/HTTPS, and infrastructure troubleshooting practices.
• Experience with system monitoring, logging, performance management, and operational support for critical production environments.
• Ability to collaborate effectively with technical stakeholders, lead complex investigations, and contribute to mentoring and knowledge sharing across engineering teams.

Responsibilities

• Lead the administration, optimisation, and continuous improvement of enterprise Unix/Linux environments, ensuring they remain secure, reliable, and available to support critical business operations.
• Drive infrastructure automation and operational efficiency through tools such as Shell scripting, Python, Ansible, Terraform, and configuration management practices across on-premises, cloud, and hybrid environments.
• Partner with application, database, middleware, network, security, and architecture teams to resolve complex technical challenges, improve platform performance, and support technology refresh, migration, and cloud adoption initiatives.
• Contribute to a culture of operational excellence by enhancing system resilience, supporting disaster recovery and high-availability solutions, mentoring other engineers, and helping shape infrastructure standards, roadmaps, and best practices.

Job description

Description

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.

About Leidos Australia

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 Civil Digital Modernisation business delivers IT services to Australian Federal and State Government departments and agencies to accelerate digital modernisation and ensure secure, resilient, and adaptive environments that meet evolving regulatory, compliance, and business needs. Our approach integrates advancing data, AI, cloud, and automation delivering agility, security, efficiency, and innovation at scale.

The Opportunity

As a Senior Unix Engineer, you’ll play a key role in supporting and evolving the enterprise Unix and Linux platforms that underpin critical business and customer services. Working as part of a highly skilled infrastructure team, you’ll provide technical leadership across operational support, automation, security, resilience, and platform modernisation initiatives.

• Lead the administration, optimisation, and continuous improvement of enterprise Unix/Linux environments, ensuring they remain secure, reliable, and available to support critical business operations.
• Drive infrastructure automation and operational efficiency through tools such as Shell scripting, Python, Ansible, Terraform, and configuration management practices across on-premises, cloud, and hybrid environments.
• Partner with application, database, middleware, network, security, and architecture teams to resolve complex technical challenges, improve platform performance, and support technology refresh, migration, and cloud adoption initiatives.
• Contribute to a culture of operational excellence by enhancing system resilience, supporting disaster recovery and high-availability solutions, mentoring other engineers, and helping shape infrastructure standards, roadmaps, and best practices.

About You

You are an experienced Unix/Linux infrastructure professional who enjoys solving complex technical challenges, improving platform reliability, and driving automation. You bring a collaborative approach, thrive in enterprise environments, and are passionate about building secure, resilient, and high-performing platforms.

Essential

• Significant experience in Unix/Linux systems administration or engineering within large-scale enterprise environments.
• Experience with enterprise operating systems such as Red Hat Enterprise Linux (RHEL), SUSE Linux, IBM AIX, or similar platforms.
• Advanced knowledge of Unix/Linux operating system architecture, administration, performance tuning, troubleshooting, and capacity management.
• Experience managing operating system patching, upgrades, lifecycle management, vulnerability remediation, and security hardening activities.
• Capability in Shell scripting and automation, with experience using tools such as Python, Ansible, Terraform, or equivalent technologies.
• Knowledge of storage technologies including LVM, SAN, NAS, and enterprise file systems.
• Experience supporting high-availability, clustering, backup, recovery, and disaster recovery solutions.
• Understanding of TCP/IP networking, DNS, SSH, HTTP/HTTPS, and infrastructure troubleshooting practices.
• Experience with system monitoring, logging, performance management, and operational support for critical production environments.
• Ability to collaborate effectively with technical stakeholders, lead complex investigations, and contribute to mentoring and knowledge sharing across engineering teams.

Advantageous

• Experience with PowerHA/HACMP, Veritas Volume Manager, Veritas Cluster Server, or comparable clustering and storage technologies.
• Familiarity with cloud platforms such as AWS, Microsoft Azure, Oracle Cloud Infrastructure, or hybrid cloud environments.
• Experience with monitoring and observability platforms such as Splunk, Dynatrace, Grafana, or Prometheus.
• Knowledge of enterprise application environments including Oracle, WebLogic, IBM WebSphere, or similar platforms.
• Familiarity with Docker, Kubernetes, CI/CD pipelines, DevOps, SRE, Agile, or ITIL practices.
• Relevant Unix/Linux, Red Hat, IBM AIX, cloud, or infrastructure certifications.

Qualifications

A degree, diploma, or equivalent practical experience in Computer Science, Information Technology, Engineering, or a related discipline is desirable. Relevant Unix/Linux, Red Hat, IBM AIX, cloud, or infrastructure certifications will be highly regarded.

This role requires the successful applicant to hold a NV-1 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.

Commitment to Non-Discrimination

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.