Senior Infrastructure Engineer – Linux/Unix

About the role

Leidos Australia is seeking a Senior Infrastructure Engineer to lead the administration, optimisation and continuous improvement of enterprise Unix/Linux environments that support critical business and customer services.

Key responsibilities

• Lead the administration, optimisation and improvement of enterprise Unix/Linux platforms, ensuring security, reliability and availability.
• Drive infrastructure automation using Shell scripting, Python, Ansible, Terraform and configuration management across on‑prem, cloud and hybrid environments.
• Partner with application, database, middleware, network, security and architecture teams to resolve complex technical challenges and support technology refresh, migration and cloud adoption initiatives.
• Enhance system resilience, support disaster recovery and high‑availability solutions, and mentor other engineers.

Required profile

• Significant experience in Unix/Linux systems administration or engineering within large‑scale enterprise environments.
• Advanced knowledge of operating system architecture, performance tuning, capacity management and security hardening.
• Proven ability to collaborate with technical stakeholders, lead investigations and share knowledge across teams.

Required skills

• Unix/Linux platforms – Red Hat Enterprise Linux, SUSE Linux, IBM AIX.
• Scripting and automation – Shell, Python, Ansible, Terraform.
• Storage technologies – LVM, SAN, NAS, PowerHA/HACMP, Veritas Volume Manager, Veritas Cluster Server.
• Cloud platforms – AWS, Microsoft Azure, Oracle Cloud Infrastructure.
• Monitoring – Splunk, Dynatrace, Grafana, Prometheus.
• Containerisation and orchestration – Docker, Kubernetes.

What we offer

• Flexible work options including Life Days, part‑time, job sharing and compressed hours.
• Wellbeing support with free Headspace, MeQuilibrium and dedicated wellness spaces.
• Access to over 120,000 on‑demand learning courses and professional development opportunities.
• Opportunities to work on nationally significant projects with impact and career growth.