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 optionResponsibilities and Duties: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.Skills:Required: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 environments.Network Scalability & Performance Management: Identifies appropriate measures for assessing network performance, validates metrics with key stakeholders, and implements optimizations for low-latency, high-traffic demands.Troubleshooting & Fault Isolation: Methodically analyzes complex network failures, diagnoses routing or latency anomalies, and executes swift remediations to minimize business impact.Technical Communication: Communicates and articulates complex network designs, security risks, and technical strategies in a clear, compelling manner tailored to both technical teams and leadership.Risk Management & Security Compliance: Plans, identifies, and prioritizes network vulnerabilities and operational risks; develops proactive response plans to mitigate network and security threats.Change Management: Identifies, verifies, and manages changes to enterprise network scope and infrastructure configurations using structured change management procedures.Project Sequencing & Resource Execution: Organizes, schedules, and prioritizes infrastructure implementations and upgrades to ensure timely project delivery without business disruption.O’Reilly Auto Parts has a proven track record of growth and stability. O’Reilly is full of successful career stories and believes in a strong promote-from-within philosophy, encouraging you to grow your career along with the organization. Total Compensation Package:Competitive Wages & Paid Time OffStock Purchase Plan & 401k with Employer Contributions Starting Day OneMedical, Dental, & Vision Insurance with Optional Flexible Spending Account (FSA)Team Member Health/Wellbeing ProgramsTuition Educational Assistance ProgramsOpportunities for Career GrowthO’Reilly Auto Parts is an equal opportunity employer. The Company does not discriminate on the basis of race, religion, color, national origin or ancestry (including immigration status or citizenship), sex, sexual orientation, gender identity, pregnancy (including childbirth, lactation, and related medical conditions,) age (40 and over), veteran status, uniformed service member status, physical or mental disability, genetic information (including testing or characteristics) or another protected status as defined by local, state, or federal law, as applicable.Qualified individuals with a disability may be entitled to reasonable accommodation under the Americans with Disabilities Act. If you require a reasonable accommodation during the application or employment process, please send an email to: View email address on us.fitly.work or call View phone number on us.fitly.work option , and provide your requested accommodation, and position details. Job SummaryJob number: R196217Profession: Information Technology