Senior Network Engineer - Routing & Switching

Description

Leidos is seeking a Senior Network Engineer specializing in routing and switching to engineer, implement, and sustain enterprise network infrastructure across a large, distributed environment. The role carries hands‑on responsibility for the routed and switched core — designing changes, implementing them cleanly, and resolving the complex problems that reach the senior engineering tier.

This position supports overall network engineering across a broad range of efforts, including planning, designing, and evaluating components of the network. Duties include developing specifications for routing and switching designs, evaluating and recommending technologies to enhance current capabilities, performing needs assessments, and performing installation, modification, testing, and servicing of network equipment.

The successful candidate operates independently on complex engineering work, translates requirements into implementable designs, and serves as an escalation point for routing, switching, and transport issues that others cannot resolve.

Impact: Contributes to the completion of significant project milestones and recommends technical solutions and improvements that affect program results. Work is performed under general direction, with latitude for independent judgment on technical approach.

Complexity: Resolves complex technical problems requiring in-depth analysis, evaluation of multiple factors, and application of established engineering principles and best practices.

Communication: Communicates technical information, design recommendations, risks, and status to engineering leadership, peer teams, and stakeholders. Explains complex technical concepts clearly to both technical and non-technical audiences.

Knowledge: Strong working knowledge of routing and switching principles, theories, and concepts, with demonstrated depth across enterprise network technologies.

• Engineer, configure, and implement enterprise routing and switching infrastructure, including core, distribution, access, and WAN edge layers.
• Design and implement routing policy using BGP, OSPF, EIGRP, and static routing, including route redistribution, filtering, summarization, path selection, and convergence tuning.
• Engineer Layer 2 infrastructure, including VLAN architecture, spanning‑tree design, link aggregation, trunking, and loop prevention.
• Implement and maintain VRFs, MPLS/VPN services, tunneling, multicast, QoS policy, and high‑availability designs such as HSRP/VRRP and redundant uplink topologies.
• Develop specifications for network architecture, evaluate and recommend new technologies to enhance current capabilities, and perform needs assessments.
• Perform installation, modification, configuration, testing, and servicing of network equipment, including hardware refresh and software/firmware lifecycle upgrades.
• Baseline and optimize network performance — latency, throughput, utilization, convergence, and error rates — and remediate identified deficiencies.

• Develop implementation plans, test and validation steps, rollback procedures, and change documentation for network changes, and execute them during approved change windows.
• Provide senior‑level troubleshooting and escalation support for complex routing, switching, transport, and connectivity issues spanning multiple layers and vendors.
• Perform packet‑level and protocol‑level analysis to isolate faults across the network, systems, and application boundary.
• Support capacity planning, configuration standardization, and compliance of device configurations against approved baselines and hardening requirements.
• Partner with architecture, cybersecurity, operations,…