Senior Network Support Engineer

00100 LEIDOS, INC.; Fort Huachuca (AZ); Hybrid; USD 92,000 - 167,000; Full time

Benefits offered by this job

Competitive compensation

Health and Wellness programs

Income Protection

Paid Leave

Retirement

Job summary

Leidos is seeking a Senior Network Support Engineer to support the Army Global Unified Network (AGUN) program. The role requires a hybrid schedule (3 days onsite at GCC, 2 days remote), an Active Secret clearance, and DoD IAT Level II certification before starting.

You will troubleshoot 24/7/365 network operations, configure Cisco SD‑WAN, manage ITSM tickets, and work with VMware, RHEL, and InfoVista in a mission‑critical environment.

Qualifications

• Bachelor's degree required with 8+ years of relevant experience or master's with 6+ years.
• Active Secret clearance required.
• DoD IAT Level II certification (Security+ or higher) required before starting.
• Hands-on experience supporting Cisco SD-WAN environments.
• Knowledge of SDN, VMware, and Linux(RHEL).
• Experience with InfoVista and ITSM tools (Jira Service Desk).
• Familiarity with LAN/WAN, VPNs, routing, and firewalls.

Responsibilities

• Support global Army network operations to ensure 24/7 availability and security.
• Troubleshoot and resolve complex network incidents and outages.
• Configure and support Cisco SD-WAN and enterprise networking technologies.
• Manage changes, updates, and remediation activities.
• Operate incident tickets using ITSM tools (Jira Service Desk).
• Monitor performance and reliability; propose improvements.
• Collaborate with teams on migrations, integrations, and modernization.

Skills

Troubleshooting

Communication

Teamwork

Cisco SD-WAN

SDN

VMware

RHEL

InfoVista

Security clearance

Education

Bachelor's degree in a relevant field

Master's degree in a related field

DoD IAT Level II certification

Tools

Cisco SD-WAN

VMware

RHEL

InfoVista

Jira Service Desk

Confluence

Job description

Program: Army Global Unified Network (AGUN). Work Schedule: Hybrid – 3 days onsite at the Global Cyber Center (GCC), 2 days remote. Clearance Required: Active Secret. Certification Required: DoD IAT Level II (Security+ or equivalent).

Help Keep the U.S. Army Connected Worldwide! Leidos is seeking an experienced Senior Network Support Engineer to support the Army Global Unified Network (AGUN) program.

What You'll Do

• 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 mission-driven surge support.
• Collaborate with technical teams to improve network stability, security, and operational efficiency.

What We're Looking For

• Bachelor's degree with 8+ years of relevant experience, or a master's degree with 6+ years of relevant experience. Additional applicable experience may be considered in place of a degree.
• 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, BGP, 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.

Preferred Qualifications

• CCNP certification or equivalent.
• Linux shell scripting experience.
• Experience with GitLab, CI/CD pipelines, Jira, and Confluence.
• Knowledge of network automation tools such as Ansible, Terraform, Puppet, Salt, and Git.
• Experience with network monitoring tools such as SNMP, NETMON, and LiveAction.
• Experience with at least two of the following: NetFlow, Elastic, Kafka, Grafana, Prometheus, or Nexus Repository.
• Experience supporting large, geographically dispersed enterprise networks.
• Familiarity with U.S. Army network security requirements and DoD network operations.

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. If you're a skilled Network Engineer with Cisco SD‑WAN experience who enjoys solving challenging network problems, we want to hear from you! Join Leidos and help keep the Army connected. At Leidos, we outthink, outbuild, and outpace the status quo – because the mission demands it.

Original Posting:

Original Posting: November 6, 2026

Pay Range:

Pay Range $92,300.00 - $166,850.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Pay and Benefits

• Competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Leidos Corporate Overview

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.