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Job Description 

Senior Network Engineer — Data Center (Cisco ACI)

Location: Charlotte, NC or Cincinnati, OH (hybrid)
Travel: ~5% (includes quarterly in-person planning sessions)
On-call: Rotational, approximately every 6–8 weeks
We’re looking for a Senior Network Engineer to join a growing team responsible for enterprise data center and network infrastructure at scale (~30,000 nodes across the environment). This role owns the design, implementation, and support of our Cisco ACI data center fabric and connects into the broader routing/switching and WAN ecosystem. You’ll bring deep technical expertise while working closely with cross-functional teams, architects, and operations to deliver reliable, secure network solutions.  This is a priority hire supporting an active team transition — we’re looking to fill this role quickly with minimal disruption to ongoing operations.

What You’ll Do

• Design, implement, and maintain enterprise network solutions across MPLS WAN, SD-WAN, Data Center, Wireless, VPN, Internet Edge, and Cellular network environments
• Design, deploy, and troubleshoot Cisco ACI fabrics, Nexus switching platforms, Nexus Dashboard, and multi-site/multi-pod data center architectures
• Engineer and support Cisco-based solutions including Catalyst, Nexus, ACI, SD-WAN, ISE, Secure Firewall, and cloud-connected network services
• Lead technical design and implementation of MPLS, Segment Routing, BGP, OSPF, EVPN, VXLAN, QoS, and large-scale routing and switching environments
• Develop and maintain network architectures, standards, reference designs, implementation guides, configuration templates, and operational documentation
• Evaluate, test, and integrate new technologies; conduct proof-of-concepts and provide vendor recommendations
• Develop and maintain network automation using APIs, Python, Ansible, and infrastructure-as-code methodologies, working within established automation team standards
• Perform advanced troubleshooting and root cause analysis across enterprise network environments
• Monitor performance, capacity, availability, and user experience using telemetry and assurance platforms
• Conduct security reviews, configuration audits, compliance validation, and quality control assessments
• Create engineering work packages, implementation plans, migration procedures, and rollback documentation
• Collaborate with architects, operations, cybersecurity teams, and vendors to deliver network solutions
• Mentor junior engineers and contribute to standards, best practices, and continuous improvement initiatives
• Participate in after-hours maintenance and provide escalation support for critical network incidents as part of an on-call rotation

What You Bring

• Bachelor’s degree in IT/Computer Science plus 5+ years of experience, including 4+ years designing and supporting Cisco Systems products — or, in lieu of a degree, 10+ years of IT experience with 5+ years on Cisco Systems products
• Hands-on experience with Cisco ACI, Nexus platforms, and data center fabric architecture
• Strong routing and switching background, including BGP and Segment Routing
• Experience with network capacity planning, network security principles, and network management best practices
• Strong interpersonal and communication skills — able to explain technically complex subjects clearly to both technical and business audiences
• Demonstrated critical thinking and risk/safety awareness appropriate for operating in a critical infrastructure environment
• Experience coordinating across multiple groups, teams, and vendors simultaneously
• Ability to work productively with minimal direct supervision; strong organizational and time management skills
• Adherence to formal Change Management practices
• Willingness and ability to learn new skills and technologies

Nice to Have

• Palo Alto firewall familiarity (routing/BGP context — not firewall policy administration)
• CCNA or equivalent Cisco certification
• Agile/Scrum-related certification or experience
• Working-level Python/API automation skills

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Equal Employment Opportunity Statement
Gravity IT Resources is an Equal Opportunity Employer. We are committed to creating an inclusive environment for all employees and applicants. We do not discriminate on the basis of race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, veteran status, or any other legally protected characteristic. All employment decisions are based on qualifications, merit, and business needs.