Cubic Defence Australia is seeking a Defence Network Specialist to ensure the performance, reliability, and security of our Air Ranges and Debrief Support (ARDS) network infrastructure. This is a unique opportunity to work alongside military aircrew in a challenging and rewarding technical environment. Key Responsibilities Design, implement, and maintain robust and secure CISCO-based network systems. Diagnose, resolve, and document network issues and performance bottlenecks. Manage firmware releases and patches for network and application infrastructure. Implement security measures such as firewalls, IDS, and encryption in line with ASCS ISM controls. Collaborate with IT and engineering teams to ensure seamless operational support. Train RAAF aircrew and groundcrew in mission debriefing systems and demonstrate software upgrades. Maintain accurate documentation and support records in compliance with contract and security requirements. Ideal Candidate Education & Experience: Certificate IV / Diploma / Degree in Information Technology (Networking) or related field CompTIA A and/or Network Certification (or equivalent experience) Minimum 6 years of relevant IT experience Red Hat Linux experience highly desirable Skills & Attributes: Strong understanding of CISCO networking and network performance monitoring Proficient in technical troubleshooting and issue resolution Excellent written and verbal communication skills Ability to lift up to 25 kg Strong documentation and record-keeping skills Requirements Must be an Australian Citizen Hold a Negative Vetting Level 1 (NV1) security clearance and be eligible for NV2 (in line with AGSVA guidelines) Pass criminal and/or background screening as required Why Join Us? At Cubic, you'll be part of a team delivering cutting-edge solutions for national defence. We invest in your continued professional development, provide access to advanced training, and offer opportunities to work on meaningful projects in a secure, high-impact environment.