Tier 3 Network Lead

DMI•Washington, DC

1d•Onsite

About The Position

DMI, LLC is seeking a Tier 3 Network Lead who owns the performance of wired and wireless infrastructure across four distributed sites and manages the full incident lifecycle across LAN, WAN, and cloud environments. This role is the senior technical authority for routing, switching, and network monitoring, directing Tier 1/2 escalations, coordinating ISP relationships, and leading network change management within an ITSM framework to ensure 24x7x365 availability.

Requirements

Expert-level knowledge of routing/switching protocols and multi-site LAN/WAN environments
Proficiency in SolarWinds Orion, Cisco IOS, Aruba Central, TACACS+, and Wireshark
Familiarity with ITIL 4 Incident and Problem Management
CCNP certification
Must be a U.S. Citizen

Responsibilities

Monitor and maintain LAN/WAN performance using SolarWinds Orion, including alert dependency configuration; diagnose and resolve outages, routing loops, circuit failures, and hardware faults
Manage wired and wireless infrastructure including Aruba IAP-734/735 APs, Aruba CX6300 switches, HPE Aruba Central, Cisco IOS, HP Switch CLI, TACACS+, and Wireshark
AWS CloudWatch; analyze trend data proactively to identify degrading hardware or flapping interfaces before service impact
Lead P1/P2 root cause analysis and stakeholder communications; maintain the Known Error Database (KEDB)
Coordinate with ISPs on circuit installation, upgrades, and outage restoration; support data center operations and DAS infrastructure management
Provide technical direction to network support staff; partner with customer IT Security on NIST-aligned network security assessments