Lead IT Infrastructure Engineer

Lumen Technologies is a trusted network for AI, transforming how businesses connect in an AI-driven world. The Lead IT Infrastructure Engineer will provide technical direction for enterprise-level network infrastructure, ensuring optimal performance, security, and scalability while mentoring junior engineers.

Responsibilities:

• Engineer and support routing & switching services with day-to-day and on-call responsibilities
• Deliver and maintain data center fabric / SDN environments including service requests, upgrades, problem remediation, and standardization across environments
• Perform complex network changes and migrations ensuring change planning, risk management, rollback readiness, and post-change validation
• Assist with load balancing operations and request fulfillment
• Provide escalation and incident leadership for complex, cross-domain outages and degradations; drive root-cause isolation, restoration, and durable fixes while coordinating stakeholders
• Familiarity with hybrid connectivity patterns that integrate on-prem and cloud network services, ensuring seamless routing, segmentation, and operational supportability for migrations and steady-state operations
• Monitor and optimize network health using observability and diagnostic tooling, proactively identifying risks and improving reliability
• Develop and maintain engineering documentation including network/service diagrams, design references, operational runbooks, and standards
• Familiarity with automation and operational efficiency of operational tasks
• Collaborate with internal partners and external vendors to deliver business-focused solutions
• Mentor and provide technical leadership through peer reviews, knowledge sharing, and setting best practices for consistent engineering outcomes

Requirements:

• Bachelor's degree or equivalent education and experience with typically 5+ years Enterprise level support and design experience
• Proven experience, or a willingness to learn, maintaining Cisco ACI
• Demonstrated expertise in implementing and managing enterprise-level services including advanced routing protocols (BGP and OSPF), virtual routing (VRFs), and network segmentation
• You must be a US Citizen or Permanent Resident/Green Card for consideration for this position
• This position will have support responsibilities for Government contracts and will additionally require successfully passing GSA suitability (public trust/Tier 2S) investigations