Senior Network Engineer: Cisco SD-WAN (Hybrid, Active Secret)

Leidos; Sierra Vista (AZ); Hybrid; USD 92,000 - 167,000; Full time

Benefits offered by this job

Hybrid work schedule

On‑call rotation

Job summary

Leidos is seeking a Senior Network Support Engineer to support the Army Global Unified Network (AGUN) program. The role requires hands‑on network operations, troubleshooting, and engineering support across a global environment, with focus on Cisco SD‑WAN and enterprise networking.

Umbrella responsibilities include incident management, migrations, and collaboration with engineering teams to enhance security and performance.

Qualifications

• Bachelor’s degree with 8+ years of relevant experience, or a master’s degree with 6+ years of relevant experience.
• Current Active Secret security clearance.
• DoD IAT Level II certification (Security+ or higher) required before starting.
• Hands‑on experience supporting Cisco SD-WAN environments.
• Knowledge of Software Defined Networking (SDN).
• Experience with VMware virtualization and Red Hat Enterprise Linux (RHEL).
• Experience using InfoVista network performance management tools.
• Experience with at least two of the following: Cisco DNA Center / Prime, Juniper Networks, Palo Alto Networks, Dell Networking, Junos Space, AppGate.
• Strong understanding of LAN/WAN, TCP/UDP, IPSec, VPNs, Layer 2/Layer 3 routing, and firewalls.
• Familiarity with SFTP, SSH, SCP, SNMP, and NTP.
• Experience with ITSM ticketing tools and incident management.
• Strong troubleshooting, communication, and teamwork skills.
• Ability to work a hybrid schedule (3 days onsite / 2 days remote) and participate in a 24/7 on‑call rotation.

Responsibilities

• Support the Army's global network operations, ensuring 24/7/365 availability, performance, and security.
• Troubleshoot and resolve complex network incidents, outages, and connectivity issues.
• Configure, maintain, and support Cisco SD-WAN and enterprise networking technologies.
• Execute approved network configuration changes, security updates, and remediation activities.
• Manage incident and service request tickets using Jira Service Desk or other ITSM tools.
• Monitor network performance, capacity, and reliability and recommend improvements.
• Support network migrations, system integrations, cutovers, and modernization initiatives.
• Work with engineering teams and mission partners to identify and resolve network issues.
• Provide timely operational updates to the Global Cyber Center (GCC) and program leadership.
• Support environments using VMware, Red Hat Enterprise Linux, and InfoVista.
• Participate in a 24/7 on‑call rotation, including occasional nights, weekends, holidays, and surge support.
• Collaborate with technical teams to improve network stability, security, and operational efficiency.

Skills

Enterprise networking

Cisco SD-WAN

Troubleshooting

Teamwork

Communication

Education

Bachelor's degree

Master's degree

Tools

Jira Service Desk

VMware

RHEL

InfoVista

GitLab

Confluence

CI/CD tooling

Cisco DNA Center/Prime

Ansible

Terraform

Puppet

Salt

SNMP

LiveAction

Job description

Leidos is seeking a Senior Network Support Engineer to support the Army Global Unified Network (AGUN) program. The role requires hands‑on network operations, troubleshooting, and engineering support across a global environment, with focus on Cisco SD‑WAN and enterprise networking.

Umbrella responsibilities include incident management, migrations, and collaboration with engineering teams to enhance security and performance.