* Support defence cyber operations in high-trust environments
* Harden Linux systems to CIS benchmarks
* Conduct forensic investigations and vulnerability analysis
Key Responsibilities
* Lead the detection and triage of threats within defence networks.
* Harden systems and services against intrusion using best-practice security models.
* Write automation scripts (Bash/Python) for response playbooks and compliance.
* Deploy and maintain firewall configurations across hybrid environments.
* Perform forensic log analysis and vulnerability assessments.
* Ensure environments remain compliant with ACSC Essential Eight and NIST.
Core Linux Skills
* Deep command-line expertise (grep, awk, sed, tcpdump).
* Secure configuration of services and logging systems.
* Firewall lockdown and secure rule creation.
* Automated patch deployment across multiple workloads.
What You Will Bring
* NV1 clearance (active or previously held).
* Strong Linux administration and hardening background.
* Familiarity with SIEM and EDR tools (Splunk, Vision One).
* Proficiency in Bash and Python scripting.
* Experience working under defence or regulated frameworks.
* Desirable certifications: OSCP, GCFA, GCIH, Security+.
Why This Job?
Based in Newcastle, this role gives you a pathway into Australia's defence and critical infrastructure programs. You'll harden systems against advanced threats while building long-term expertise in classified environments.