L2/L3 Network Technical Support Engineer – Broadband | Redmond, WA

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

Hi,

We are hiring an experienced L2/L3 Network Technical Support Engineer for a long-term contract opportunity supporting a broadband network project.

Position Details

Location: Redmond, WA (Onsite, 5 days per week)
Employment Type: Long-term Contract on W2
Work Authorization: US Citizen or Green Card only

Role Overview

We are looking for a hands-on network engineer with strong L2/L3 troubleshooting skills and experience supporting production networks. The role involves investigating broadband connectivity issues, analyzing network traffic, identifying root causes, and coordinating with engineering and operations teams to resolve complex incidents.

Key Responsibilities

• Troubleshoot production network issues involving connectivity, latency, packet loss, routing, and network performance.

• Investigate Layer 2 technologies, including Ethernet, VLANs, QinQ, ARP, MAC learning, and STP.

• Troubleshoot Layer 3 technologies, including IPv4/IPv6, BGP, OSPF/IS-IS, VRFs, DHCP, DNS, and NAT.

• Analyze packet captures, network logs, alarms, interface counters, and routing tables.

• Use network CLI tools and monitoring platforms to isolate faults and validate resolutions.

• Investigate broadband subscriber connectivity, IP assignment, authentication, CGNAT, and Internet reachability.

• Perform root-cause analysis for recurring and high-impact incidents.

• Collaborate with NOC, network engineering, operations, and vendor teams.

• Support network upgrades, migrations, maintenance, and service launches.

• Maintain troubleshooting documentation and operational procedures.

Required Skills and Experience

• 5+ years of experience in network engineering, network operations, or technical support.

• Strong hands-on experience troubleshooting Layer 2 and Layer 3 networks in production.

• Solid understanding of TCP/IP, Ethernet, VLANs, ARP, DHCP, DNS, IPv4/IPv6, and routing.

• Practical experience with BGP and OSPF/IS-IS.

• Knowledge of VRFs, routing policies, NAT/CGNAT, QoS, and IP services.

• Experience with Wireshark, tcpdump, packet analysis, network logs, and monitoring tools.

• Ability to perform end-to-end packet-flow analysis and identify root causes rather than simply elevate incidents.

• Experience working with cross-functional teams and network vendors.

Preferred Broadband Experience

Experience in an ISP, telecommunications, or broadband service provider environment is highly desirable.

Exposure to FTTH, GPON/XGS-PON, OLT/ONT, BNG/BRAS, RADIUS/AAA, subscriber management, VLAN/QinQ, MPLS, IPv6, and network service assurance will be beneficial.

Experience with network automation tools such as Python or Ansible, along with CCNA, CCNP, JNCIA, or JNCIP certification, is an added advantage.

Candidates with strong hands-on L2/L3 troubleshooting skills, production incident management experience, and broadband or ISP network exposure will be given preference.

Thank you,