Field Network Engineer - Intelligent Transportation Systems

Job Summary:

The Field Network Engineer for the Intelligent Transportation Systems (ITS) program at DDOT is a senior technical role responsible for designing, deploying, and maintaining a secure, highly available network infrastructure. This network supports traffic signals, video surveillance, and IoT devices across the District of Columbia, ensuring mission-critical uptime, safety, and reliability through advanced networking technologies such as Cisco DMVPN and Metro Ethernet transport. Responsibilities:

• Deploy and support Cisco DMVPN hub-and-spoke and spoke-to-spoke overlay networks.
• Configure and troubleshoot IPsec VPN profiles, GRE tunnels, NHRP mappings, and tunnel interfaces.
• Implement dynamic routing protocols (BGP, OSPF, EIGRP) over DMVPN tunnels for failover and path optimization.
• Design failover and redundancy strategies including LTE/5G backup paths.
• Monitor VPN tunnel health, latency, and throughput to maintain performance standards.
• Coordinate Metro Ethernet circuit provisioning and incident resolution with service providers.
• Manage dual-WAN redundancy and carrier handoff configurations at field sites.
• Perform field installations and cutovers of network equipment such as routers, switches, and cabinets.
• Manage VLANs, IP addressing, and Layer 2/3 connectivity between remote sites and data centers.
• Implement network segmentation using VRFs, VLANs, and firewall policies.
• Apply and tune QoS policies for latency-sensitive traffic like signal control and video.
• Troubleshoot network issues from field sites through WAN to data centers.
• Maintain accurate network documentation including diagrams and configuration records.
• Support traffic signal control systems, CCTV platforms, and IoT devices with reliable transport connectivity.
• Coordinate field cabinet upgrades for new network equipment and environmental needs.
• Manage migration from legacy infrastructure to DMVPN-based transport.
• Monitor network performance and service-level compliance across ITS transport links.
• Ensure encrypted communications and compliance with security policies.
• Manage VPN certificate lifecycles, key rotation, and trust domains.
• Implement IoT security and segmentation best practices.
• Support security audits, vulnerability assessments, and remediation efforts.

Required Skills & Certifications:

• Bachelor s degree in Computer Science, IT, Network Engineering, or equivalent experience.
• 11 years of relevant experience in network engineering.
• Experience with Intelligent Transportation Systems including traffic signals and CCTV transport.
• Proficiency with Cisco DMVPN (Phase 2/3), IPsec VPN, GRE tunnels, and dynamic routing protocols (BGP, OSPF, EIGRP).
• Experience with LTE/5G failover solutions and high-availability network design.
• Network automation skills using Ansible or Python scripting.
• Knowledge of IoT security and segmentation best practices.
• Fiber optic network experience including single-mode fiber and SFP/SFP+ transceivers.
• Experience working with state or municipal Departments of Transportation.
• Active CCNA Certification.
• Strong skills in technical documentation and communication.

Preferred Skills & Certifications:

• CCIE Enterprise Infrastructure certification.
• Certified Fiber Optic Technician (CFOT) or equivalent.
• CompTIA Network+ or Security+ certifications.
• ITIL v4 Foundation certification.

Special Considerations:

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

Scheduling:

• Work schedule includes field and data center hours as required.
• On-call shifts for emergency network support outside standard hours.
• Maintenance windows participation as scheduled.