Onsite L2/L3 Network Engineer for Production ISP

Inabia Software & Consulting Inc.; Redmond; On-site; AUD 137,000 - 235,000; Part time

Job summary

Inabia Software & Consulting Inc. is seeking an experienced L2/L3 Network Technical Support Engineer for a long-term contract to support a broadband network project in Redmond, WA.

Onsite, five days a week, you will troubleshoot complex production issues and coordinate with NOC and engineering teams. You will analyze packet captures, logs, and routing tables, perform end-to-end packet-flow analysis, and drive root-cause investigations for high-impact incidents, with emphasis on rapid, reliable

Qualifications

• 5+ years of experience in network engineering, network operations, or technical support.
• Hands-on experience troubleshooting Layer 2 and Layer 3 networks in production.
• Strong understanding of TCP/IP, Ethernet, VLANs, ARP, DHCP, DNS, IPv4/IPv6, and routing.
• Experience with BGP and OSPF/IS-IS.
• Familiarity with VRFs, NAT/CGNAT, QoS, and IP services.
• Experience with Wireshark, tcpdump, packet analysis, and monitoring tools.
• Ability to perform end-to-end packet-flow analysis and root-cause identification.
• Experience collaborating with cross-functional teams and vendors.

Responsibilities

• Troubleshoot production network issues: connectivity, latency, packet loss, routing.
• Investigate Layer 2 tech: Ethernet, VLANs, QinQ, ARP, MAC learning, STP.
• Troubleshoot Layer 3 tech: IPv4/IPv6, BGP, OSPF/IS-IS, VRFs, DHCP, DNS, NAT.
• Analyze packet captures, logs, alarms, interface counters, routing tables.
• Use CLI tools and monitoring platforms to isolate faults and validate resolutions.
• Investigate subscriber connectivity, IP assignment, authentication, CGNAT, reachability.
• Perform root-cause analysis for high-impact incidents.
• Collaborate with NOC, network engineers, operations, and vendors.
• Support network upgrades, migrations, maintenance, and launches.
• Maintain troubleshooting docs and SOPs.

Skills

L2/L3 troubleshooting

TCP/IP networking

Packet analysis

Cross-functional collaboration

NOC coordination

Tools

BGP

OSPF/IS-IS

VRFs

NAT/CGNAT

QoS

DHCP

DNS

Wireshark

Job description

Inabia Software & Consulting Inc. is seeking an experienced L2/L3 Network Technical Support Engineer for a long-term contract to support a broadband network project in Redmond, WA.

Onsite, five days a week, you will troubleshoot complex production issues and coordinate with NOC and engineering teams. You will analyze packet captures, logs, and routing tables, perform end-to-end packet-flow analysis, and drive root-cause investigations for high-impact incidents, with emphasis on rapid, reliable