Senior Network Support Engineer

We are seeking an experienced Senior Network Support Engineer to support the Army Global Unified Network (AGUN) program. This is an exciting opportunity to help maintain, secure, and modernize the Army's global enterprise network, ensuring reliable communications and mission readiness around the world. In this role, you'll provide hands-on network operations, troubleshooting, and engineering support across a complex, geographically dispersed environment. You'll work with advanced networking technologies, resolve critical incidents, support network migrations, and help improve network performance and security. Responsibilities: Support the Army's global network operations, ensuring 24/7/365 network 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 remotely while collaborating with geographically dispersed engineering teams during incident-response bridges, meetings, and troubleshooting activities. Provide timely operational updates to the Global Cyber Center (GCC) and program leadership. Support network environments utilizing VMware, Red Hat Enterprise Linux, and InfoVista. Participate in a 24/7 on-call rotation, including nights, weekends, holidays, and mission-driven surge support. Requirements: 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 equivalent) 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). Hands-on experience with 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, BGP, TCP/UDP, IPSec, VPNs, Layer 2/Layer 3 routing, and firewalls. Familiarity with SFTP, SSH, SCP, SNMP, and NTP. Experience using ITSM ticketing tools for incident and service request management. Strong troubleshooting, communication, and problem-solving skills. Ability to work independently while collaborating with remote technical teams. Flexibility to participate in a 24/7 on-call rotation and respond to mission-critical incidents. Benefits: Competitive salary range: $92,300.00 - $166,850.00 Why Join Leidos? At Leidos, you'll have the opportunity to work with advanced networking technologies while supporting a mission that directly impacts the U.S. Army's global operations. You'll collaborate with experienced network engineers, solve complex technical challenges, and help keep critical military communications secure and operational. Job Data by YubHub .