L2L3 Network Technical Support Engineer – Broadband

L2/L3 Network Technical Support Engineer Broadband

Location: Redmond WA (Onsite 5 days per week)

Type: W-2 Contract

Pay Rate: $70-$75 per hr.

Work Authorization: U.S. Citizen or Green Card

Role Overview

We are looking for an experienced L2/L3 Network Technical Support Engineer to provide post-launch technical support for a broadband service providers network and services. The role will be responsible for diagnosing and resolving complex network issues across broadband access IP transport and service layers.

The ideal candidate is a hands-on network engineer who can dig deep into network incidents isolate the specific fault domain analyze network behavior and traffic identify root causes and drive issues through to resolution. This role requires strong troubleshooting skills and the ability to work across multiple network domains including access aggregation routing IP services and customer connectivity.

The engineer will work closely with NOC network engineering operations architecture service assurance vendors and other technical teams to resolve production issues and improve network stability after launch.

Key Responsibilities - L2/L3 Network Troubleshooting

• Provide L2/L3 technical support for production broadband network issues following service launch.
• Troubleshoot complex incidents involving customer connectivity service degradation packet loss latency routing reachability and network performance.
• Analyze issues across the network stack to determine whether the problem originates in the access aggregation transport IP routing service or customer-premises domain.
• Perform detailed fault isolation and identify the specific network element interface route configuration protocol or service component contributing to an incident.
• Troubleshoot Layer 2 technologies such as VLANs QinQ Ethernet ARP MAC learning STP and related access/aggregation technologies.
• Troubleshoot Layer 3 technologies including IPv4/IPv6 BGP OSPF/IS-IS routing policies VRFs DHCP DNS NAT and IP connectivity.
• Analyze packet captures network logs alarms counters routing tables interface statistics and telemetry to identify root causes.
• Perform hands-on troubleshooting using CLI and network management/monitoring tools.
• Validate suspected issues by testing network paths interfaces routes configurations and service dependencies.
• Support troubleshooting of broadband subscriber connectivity and service issues including DHCP/IP address assignment authentication routing DNS CGNAT and Internet reachability as applicable to the network architecture.
• Correlate customer-impacting symptoms with network-level events and infrastructure faults.

Incident & Problem Management

• Own or contribute to resolution of complex L2/L3 production incidents.
• Work with NOC teams to investigate incidents that cannot be resolved through standard operational procedures.
• Determine the appropriate escalation path and engage network engineering architecture vendors or other technical teams when required.
• Drive incidents toward resolution rather than simply escalating them.
• Conduct root-cause analysis for recurring or high-impact network problems.
• Develop and document troubleshooting procedures known-error articles and operational runbooks.
• Identify opportunities to improve network monitoring alarms automation and operational processes based on recurring issues.
• Support post-incident reviews and provide technical recommendations to prevent recurrence.

Network Operations & Engineering Collaboration

• Collaborate with network engineering teams on complex production issues and configuration changes.
• Validate network changes and troubleshoot issues following software upgrades configuration changes migrations or new service launches.
• Support network equipment and service troubleshooting across routers switches broadband access equipment aggregation devices and IP infrastructure.
• Work with equipment and technology vendors to investigate hardware software protocol and interoperability issues.
• Provide technical input into network design improvements based on production support experience.
• Participate in planned maintenance and change activities when required.
• Support troubleshooting during critical incidents and service-impacting events.

Required Technical Skills

• Strong hands-on experience troubleshooting Layer 2 and Layer 3 networks in a production environment.
• Strong understanding of TCP/IP Ethernet VLANs ARP DHCP DNS IPv4/IPv6 routing and IP connectivity.
• Experience troubleshooting routing protocols such as BGP and OSPF/IS-IS.
• Experience with VRFs routing policies NAT/CGNAT QoS and IP service delivery.
• Ability to use network device CLI to investigate configuration and operational state.
• Strong understanding of packet flows and ability to trace a problem hop-by-hop through the network.
• Experience using packet capture and analysis tools such as Wireshark/tcpdump.
• Experience interpreting network monitoring data logs alarms interface counters routing tables and telemetry.
• Ability to distinguish between customer/device issues access-network issues transport issues IP/routing issues and application/service issues.
• Strong analytical and problem-solving skills with the ability to work from symptoms to root cause.

Broadband Experience

Experience in a broadband service provider environment is strongly preferred including exposure to technologies such as

• Fiber/FTTH broadband
• PON technologies such as GPON/XGS-PON
• OLT/ONT
• Broadband access and aggregation networks
• BNG/BRAS
• DHCP and IP address management
• RADIUS/AAA
• CGNAT
• Broadband subscriber management
• VLAN/QinQ
• MPLS/Segment Routing where applicable
• IPv6 and dual-stack broadband
• DNS
• Network monitoring and service assurance platforms

Desired Experience

• 5 years of experience in network engineering network operations or technical support.
• Experience supporting large-scale production IP/broadband networks.
• Experience working in a 24x7 operational environment and supporting critical incidents.
• Experience troubleshooting multi-vendor network environments.
• Experience with network automation or scripting using Python Ansible or similar technologies is a plus.
• Experience with network telemetry observability and service assurance platforms is a plus.
• Relevant networking certifications such as CCNA/CCNP JNCIA/JNCIP or equivalent practical experience are desirable.

What Success Looks Like

The successful candidate will be able to take an ambiguous production issue such as:

Customers in a specific region are experiencing intermittent Internet connectivity. and independently work through the network to determine

• Which customers/services are affected
• Where the affected traffic enters the network
• Whether the issue is isolated to access aggregation transport routing or IP services
• Which network devices/interfaces/routes are involved
• What network behavior is abnormal
• What evidence supports the suspected root cause
• What corrective action is required
• Whether the issue has been fully resolved after the change

The role requires someone who does not stop at identifying that the network is down or escalating the ticket but can investigate the underlying network behavior and identify the specific technical failure.

Key Attributes

• Strong troubleshooting mindset
• Hands-on and technically curious
• Comfortable working from incomplete information
• Able to analyze problems systematically and follow the traffic/data path
• Strong understanding of networking fundamentals
• Comfortable using CLI packet captures logs and monitoring tools
• Persistent in getting to root cause
• Able to communicate complex technical findings clearly
• Comfortable working under pressure during customer-impacting incidents
• Strong collaboration skills across NOC engineering architecture vendors and operations