Senior Data Center Network Engineer; Cisco ACI

Our client is seeking a Senior Data Center Network Engineer to support a large‑scale data center decommissioning and infrastructure consolidation initiative in a complex, brownfield environment for a major banking institution in New York City. This is a permanent, full‑time, on‑site position requiring a 40‑hour work week.

• Conduct detailed network audits to identify specific infrastructure targeted for retirement.
• Back up all configurations, routing tables, and VLAN databases before starting decommissioning activities.
• Design and execute robust traffic migration strategies to maintain seamless service continuity.
• Decommission legacy routers, switches, and firewalls while maintaining accurate network documentation.
• Migrate legacy infrastructure to modern, high‑performance data center platforms.
• Lead and manage terminal server consolidation initiatives.
• Perform thorough post‑migration testing and validation activities to ensure network stability.
• Operate strictly within formal change management and Change Advisory Board (CAB) approval processes.
• Partner closely with infrastructure, operations, and project teams to coordinate migration activities.

• Minimum of a Bachelor's degree or equivalent professional work experience.
• At least 10 years of enterprise and data center networking experience.
• Advanced, hands‑on expertise with Cisco Data Center Networking technologies including Nexus, Catalyst, ASR, ACI, Routing, and Switching.
• Proven experience in data center decommissioning, migration planning, and infrastructure consolidation within brownfield environments.
• High proficiency in Enterprise Routing and Switching Protocols, specifically BGP, OSPF, EIGRP, MPLS, VXLAN, and EVPN.
• An active Cisco Certified Network Professional (CCNP) Enterprise or CCNP Data Center certification.
• Exceptional native or bilingual English communication skills.

• An active Cisco Certified Internetwork Expert (CCIE) Data Center certification is strongly preferred.
• Hands‑on experience with Juniper MX and EX networking platforms.
• Operational experience with F5 BIG‑IP Local Traffic Manager (LTM) and Global Traffic Manager (GTM).
• Proficiency in network automation using Python scripting and/or Ansible.
• Experience using network management tools such as Solar Winds or Cisco Works.
• Familiarity with Visio or equivalent network diagramming tools for documentation.
• Possession of an ITIL Foundation or Project Management Professional (PMP) certification.