Principal/ Senior Network Engineer & Principal/ Senior System Engineer (L3 support, 2 recent roles)

1.Principal/ Senior Network Engineer (L3 support)

- Role OverviewThe Senior Network Engineer (L3) leads the technical operation, troubleshooting, and continuous optimization of enterprise network environments. Serving as the highest escalation tier (Level 3), this position manages multi-vendor routing, switching, perimeter security, and wireless infrastructures. The position acts as a primary technical authority during critical outages, mentors junior teams, and executes complex infrastructure projects in alignment with ITIL frameworks. Key ResponsibilitiesTier-3 Operations & Escalations: Serve as the senior escalation point for unresolved network incidents from L1/L2 teams, performing root cause analysis (RCA) and driving long-term remediations.
- Incidents & Major Outages: Lead technical bridges during major incidents, executing packet captures, path analyses, and log diagnostics to restore services within strict SLAs.
- Multi-Vendor Network Administration: Manage and maintain enterprise routing, switching, and wireless platforms (Cisco, Juniper, Cisco Meraki, UniFi).
- Perimeter Security & Firewalls: Configure, optimize, and maintain next-generation firewalls (Palo Alto Networks, Fortinet FortiGate) alongside VPNs, NAT policies, and security profiles.
- Core Protocols & Connectivity: Troubleshoot dynamic routing protocols (BGP, OSPF), VLANs, STP, VRFs, and high-availability configurations across LAN, WAN, and SD-WAN architectures.
- Projects & Change Management: Design and execute upgrades, hardware refreshes, and network migrations; draft detailed implementation and rollback plans following ITIL Change Management.
- Mentorship & Documentation: Provide technical guidance to junior engineers, publish standard operational procedures (SOPs),



and maintain up-to-date network topology documentation.
- Technical Skills & QualificationsEducation & Experience: Bachelor’s degree or Diploma in IT, Computer Science, or Network Engineering with 5–8+ years of hands-on L3 enterprise networking experience.
- Certifications: CCNP Enterprise/Security, JNCIP, PCNSE, or NSE 4–7 preferred.
- Routing & Switching: In-depth knowledge of TCP/IP, BGP, OSPF, STP, VRF, QoS, and LACP.
- Perimeter Security: Direct experience with Palo Alto PAN-OS, Fortinet FortiGate (FortiManager/FortiAnalyzer), and IPsec/SSL VPNs.
- Wireless & Branch: Management of Cisco Meraki, UniFi, and enterprise wireless deployments.
- Process & Soft Skills: ITIL v3/v4 operational fluency; strong stakeholder management under pressure.
- Working ConditionsParticipation in an on-call rotation and off-hours scheduled change windows.
- Occasional travel to regional data centers or branch offices.

2.Senior Systems & Infrastructure Engineer (L3 Support) Role OverviewThe Senior Systems & Infrastructure Engineer (L3) oversees the compute, virtualization, enterprise storage, backup, and disaster recovery ecosystem. Serving as the Level 3 escalation authority, this position maintains high availability, executes infrastructure upgrades, and guarantees business continuity across on-premises and data center environments.Key Responsibilities L3 Escalation & Problem Management: Provide Tier-3 troubleshooting for complex compute, storage, and virtualization incidents; drive Root Cause Analysis (RCA) and permanent defect elimination.





- Virtualization Architecture: Manage enterprise VMware vSphere (ESXi, vCenter, HA, DRS, vMotion) environments, including capacity planning, cluster upgrades, and performance optimization.
- Compute Infrastructure: Maintain Cisco UCS fabric interconnects, blade chassis, service profiles, and firmware baselines in coordination with TAC.
- Enterprise Storage: Provision and manage NetApp storage environments (SAN/NAS, NFS, CIFS/SMB, LUN management), monitoring health and performance metrics.
- Data Protection & DR: Administer enterprise backup frameworks (Veritas NetBackup, Veeam Backup & Replication); execute regular Disaster Recovery (DR) testing and runbook validation.
- Operating Systems & Automation: Maintain enterprise Windows Server platforms, utilizing PowerShell scripting for infrastructure maintenance and automation tasks.
- Upgrades & Maintenance: Plan and execute infrastructure firmware/software updates, applying strict pre- and post-change validation procedures.
- Technical Skills & QualificationsEducation & Experience: Bachelor’s degree or Diploma in IT, Computer Science, or System Engineering with 5–8+ years of infrastructure engineering experience.
- Certifications: VCP-DCV, Cisco Data Center, NetApp NCIE, or Veeam VMCE preferred.
- Virtualization & Compute: Advanced knowledge of VMware vSphere 7.x/8.x and Cisco UCS Manager.
- Storage & Data Protection: Hands-on experience with NetApp ONTAP, Veritas NetBackup, and Veeam Backup & Replication.
- OS & Scripting: Proficient in Windows Server management and PowerShell automation.
- Process & Soft Skills: Solid understanding of ITIL Incident, Problem, and Change Management workflows.
- Working ConditionsOff-hours maintenance coverage and scheduled on-call support.
- Periodic visits to enterprise data centers.

📌 Principal/ Senior Network Engineer & Principal/ Senior System & Infrastructure Engineersupport, 2 new roles) (Melbourne)
🏢 JustOneGalaxy Recruitment
📍 Melbourne