Senior Linux/Unix Infrastructure Engineer

Leidos LLC; City of Melbourne; On-site; AUD 120,000 - 180,000; Full time

Benefits offered by this job

Flex Your Way

Headspace & MeQuilibrium

Learn Without Limits

Work That Makes an Impact

Build Your Future

Job summary

Leidos Australia is seeking a Senior Unix Engineer to lead the administration and modernization of enterprise Unix/Linux platforms underpinning critical services. You will guide automation efforts using Shell, Python, Ansible, and Terraform across on‑premises and cloud environments.

You will collaborate with diverse teams to resolve complex challenges, drive resilience and security, and mentor other engineers while contributing to infrastructure standards and roadmaps.

Qualifications

• Significant experience in Unix/Linux systems administration in 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.

Responsibilities

• Lead the administration, optimisation and continuous improvement of enterprise Unix/Linux environments, ensuring they are secure, reliable and available to support critical business operations.
• Drive infrastructure automation and operational efficiency through 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 and support cloud adoption initiatives.
• Contribute to a culture of operational excellence by enhancing system resilience, disaster recovery and high-availability solutions, mentoring other engineers and shaping infrastructure standards and roadmaps.

Skills

Unix/Linux administration

RHEL/SUSE/AIX experience

Shell scripting

Python/Ansible/Terraform

Storage: LVM/SAN/NAS

HA/DR/backup

Networking: TCP/IP/DNS/SSH

Monitoring & logging

Cross-functional collaboration

Mentoring/knowledge sharing

Education

Degree in Computer Science / IT / Engineering

Tools

Docker

Kubernetes

Job description

Leidos Australia is seeking a Senior Unix Engineer to lead the administration and modernization of enterprise Unix/Linux platforms underpinning critical services. You will guide automation efforts using Shell, Python, Ansible, and Terraform across on‑premises and cloud environments.

You will collaborate with diverse teams to resolve complex challenges, drive resilience and security, and mentor other engineers while contributing to infrastructure standards and roadmaps.