Senior Network Security Engineer (Level 3) - Managed Services

Our client, a Melbourne-based managed services provider, is hiring a Level 3 Network & Security Engineer to be the top technical escalation point for its Network, Security & Cyber team. You'll take the toughest tickets, lead major incident response and coach the engineers coming up behind you.

What you'll do

- Act as the escalation point for L1/L2 engineers across incidents, service requests and changes
- Lead the technical response on P1/P2 major incidents, then own root cause analysis and deliver the customer-facing write-up
- Resolve complex, cross-domain and multi-vendor faults end to end
- Design, configure and troubleshoot firewall and routing policy across Palo Alto and Fortinet environments, including SD-WAN
- Plan and deliver changes with rollback plans, including after-hours windows, upgrades and migrations
- Pass chronic, recurring faults to the technical lead for formal problem management
- Mentor L2 engineers and contribute runbooks, knowledge articles and automation

What you'll bring





- 6+ years in network and security engineering, including 2+ years at L3 or senior escalation level within an MSP or MSSP
- Deep, hands-on Fortinet experience: FortiGate, FortiSwitch, FortiAP, Fortinet Secure SD-WAN, FortiManager and FortiAnalyzer. NSE 4 minimum; NSE 5/6/7 highly regarded
- Palo Alto Networks firewalls and Panorama: security policy, App-ID/User-ID, NAT, VPN, threat prevention. PCNSA/PCNSE highly regarded
- Enterprise routing and switching: BGP, OSPF, VLANs, STP, HA/clustering, QoS, IPSec and remote-access VPN
- A track record of independently resolving complex multi-vendor faults, with RCAs that hold up under customer scrutiny
- ITIL-aligned discipline across tickets, change and problem management, with comfort working to measured SLA and quality targets
- Australian work rights, and availability for on-call, after-hours work and customer site visits

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📌 Network Security Engineer (Melbourne)
🏢 Kaliba
📍 Melbourne