Sr Network Engineer (LAN, Datacenter) (Onsite Position

The Senior Network Engineer will lead the evaluation of enterprise network systems, recommend scalable architectural resources, and identify/deploy advanced networking products to optimize service levels across multisite environments. This role focuses heavily on SD-WAN, Zero Trust security models, LAN/Data Center infrastructures, and core routing architectures. The role supports standards for low-latency, high-performance networks in high-traffic retail and omnichannel environments, recommending continuous enhancements for security, mobility, and access while serving as an escalation point for complex network issues and mentoring junior team members.

This role is located in Springfield MO, remote work not an option

• Core Network & SD-WAN Optimization:
  Drive advances in SD-WAN, core routing, and switching architectures to increase the value delivered by enterprise network capabilities, improving environment efficiency and lowering total cost of technology operations.
• Data Center & LAN Infrastructure:
  Design, select, and manage business-critical LAN, Data Center, and client/server network environments in line with industry best practices; provide third-line point of escalation for global network infrastructure solutions.
• Zero Trust & Security Integration:
  Implement and enhance Zero Trust network access (ZTNA) frameworks, micro-segmentation, and security measures (e.g., next-gen firewalls, secure access service edge/SASE, and message encryption) to safeguard high-traffic, multisite connectivity.
• Technical Architecture & Evaluation:
  Discuss and recommend technical developments to improve the quality, security, and scalability of core network routing, LAN/Data Center environments, and supporting digital infrastructure to better meet business needs.
• Requirements & Performance Testing:
  Collect network and business requirements through interviews, workshops, and traffic/workflow analysis; perform network software/hardware testing, monitoring performance, and diagnosing complex latency or bottleneck issues.
• Emerging Technology Research:
  Explore and develop a detailed understanding of emerging networking technologies (such as advancements in SD-WAN protocols, Zero Trust tools, and cloud routing) to evaluate their potential impact on the organization.
• Troubleshooting & Incident Resolution:
  Provide fault isolation, deep-packet analysis, and root-cause resolution for complex core network, routing, and multisite SD-WAN challenges to limit downtime and ensure operational continuity.
• Engineering Standards & Process Migration:
  Draft engineering standards, routing policies, and configuration specifications. Document  as-is  and  to-be  network states and execute migration plans to transition to modernized network capabilities.
• Technical Leadership & Mentorship:
  Mentor associate and mid-level network engineers on complex troubleshooting, such as resolving wide area network (WAN) bottlenecks in high-priority, revenue-generating systems.
• On-Call & Operational Support:
  Participate in an on-call rotation and provide flexible, rapid response to critical network outages or urgent security incidents to maintain system availability.
• Continuous Capability Development:
  Maintain an in-depth understanding of core routing, Zero Trust, and LAN/WAN technologies, external regulations, and industry best practices through ongoing training, certifications, and specialist media.

• SD-WAN Architecture & Operations:
  Manages, configures, and optimizes SD-WAN overlays and underlays across multisite networks to ensure reliable, application-aware routing and high availability.
• Zero Trust Security Strategy:
  Identifies, designs, and enforces Zero Trust network access control, micro-segmentation, and identity-driven access policies across the enterprise.
• LAN & Data Center Networking:
  Oversees the design, deployment, and ongoing management of high-density Data Center fabrics, switching, leaf-spine architectures, and local area networks (LAN).
• Core Network & Routing Mastery:
  Demonstrates advanced knowledge of core routing protocols (BGP, OSPF, EIGRP), WAN transport strategies, and traffic engineering in complex hybrid…