DDOT - Field Network Engineer — Infras

Description

The District Department of Transportation (DDOT) is seeking a hands‑on Field Network Engineer to serve as a senior technical resource within the Intelligent Transportation Systems (ITS) program. This role is responsible for the design, deployment, and day‑to‑day operations of a secure, highly available ITS network connecting traffic signals, video surveillance systems, and IoT devices across the District of Columbia.

The network environment leverages Metro Ethernet services as the transport underlay and a Cisco DMVPN secure overlay to link distributed field sites back to DDOT’s headend facilities and data centers. The engineer will work in both field and datacenter environments, with a focus on uptime, safety, and reliability in mission‑critical operations.

• Deploy and support Cisco DMVPN (Phase 2/Phase
  3) hub‑and‑spoke and spoke‑to‑spoke overlay networks across Metro Ethernet transport.
• Configure and troubleshoot IPsec VPN profiles, GRE tunnels, NHRP mappings, and tunnel interfaces for the DMVPN fabric.
• Implement dynamic routing protocols (BGP, OSPF, EIGRP) over DMVPN tunnels to support automated failover and optimal path selection.
• Design failover and redundancy strategies, including LTE/5G backup paths, to ensure uninterrupted connectivity during circuit or equipment outages.
• Monitor tunnel health, latency, and throughput to maintain performance standards across all VPN connections.

• Coordinate with service providers on Metro Ethernet circuit provisioning (E‑Line, E‑LAN), turn‑up, and incident resolution.
• Manage dual‑WAN redundancy models and carrier handoff configurations at each site.
• Perform field installations and cutovers of routers, switches, cabinets, and handoff equipment.

• Manage VLAN configurations, IP addressing schemes, and Layer 2/Layer 3 connectivity between remote aggregation points and headend data centers.
• Implement and maintain network segmentation using VRFs, VLANs, and firewall policies to isolate ITS traffic domains.
• Apply and tune QoS policies to prioritize latency‑sensitive traffic such as signal control and video.
• Troubleshoot network issues end‑to‑end from field site through WAN transport to data center.
• Maintain accurate network documentation including diagrams, IP assignments, equipment inventories, and configuration records.

• Support DDOT's traffic signal control systems, CCTV/video surveillance platforms, and IoT field devices by ensuring reliable, low‑latency transport connectivity.
• Coordinate field cabinet upgrades to accommodate new network equipment, including power and environmental requirements.
• Manage the migration of remote aggregation points from legacy infrastructure to modern DMVPN‑based transport.
• Monitor network performance, availability, and service‑level compliance across all ITS transport links.

• Ensure all network connections utilize encrypted communications per DDOT and District government security policies.
• Manage VPN certificate life cycles, key rotation, and trust domain configurations.
• Implement IoT security and segmentation best practices for field‑deployed devices.
• Support security audits, vulnerability assessments, and remediation efforts on ITS network infrastructure.

• Combination of field work (street‑level cabinets, utility corridors), data center operations, and remote support.
• Travel to field locations across the District required; valid driver’s license required.
• Ability to lift and rack network equipment up to 50 lbs.
• Participation in scheduled maintenance windows and on‑call availability for after‑hours emergency response.

Requirements

• Bachelor’s degree in Computer Science, Information Technology, Network Engineering, or a related field (or equivalent professional experience) – Required 15 Years
• Conveying technical and functional concepts for a specific technical specialty – Required 11 Years
• Preparing complex technical documentation – Required 11 Years
• Experience with Intelligent Transportation Systems (ITS) including traffic signal controllers, CCTV/video surveillance transport, and traffic management – Required 11 Years
• Experience with LTE/5G failover solutions – Required 7 Years
• Network automation skills using Ansible or Python‑based scripting – Required 11 Years