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

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

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.

Responsibilities

• The role involves investigating broadband connectivity issues, analyzing network traffic, identifying root causes, and coordinating with engineering and operations teams to resolve complex incidents.
• 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.

Requirements

• 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 escalate 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,

Position Details Location

Redmond, WA (Onsite, 5 days per week)