Senior Linux System Administrator
Core
Architect, deploy, and maintain secure Linux server environments, Kubernetes clusters, and network infrastructure for government and defence-aligned programs.
Role type
Senior Linux Systems Administrator (Infrastructure & Security)
Builds
Secure, resilient Linux infrastructure, Kubernetes environments, and network services for critical government and defence programs.
Domain
Government / Defence / Cybersecurity
Deliverable
infrastructure
Required skills
Linux systems administration, Kubernetes (K8s), Active Directory, Group Policy, IAM, networking (firewalls, routing, switching, DNS, VLANs), system hardening, vulnerability remediation, scripting (PowerShell, Bash, Python), security auditing, compliance management
Preferred skills
CCNA, CCNP, mentoring technical teams
Technologies
Linux, Kubernetes, Prometheus, Grafana, Active Directory, PowerShell, Bash, Python
Responsibilities
Architect and maintain secure Linux server environments; Administer Active Directory, Group Policy, and IAM; Configure and manage firewalls, routers, switches, VLANs, and DNS; Lead system maintenance, patching, and change control; Implement system hardening per ASD Essential Eight; Conduct security audits and support compliance; Monitor and troubleshoot containerized applications; Provide technical leadership and guidance.
Seniority
Senior, hands-on IC with leadership responsibilities
