Senior Network Support Engineer

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

Description

Help Keep the U.S. Army Connected Worldwide!

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)

Leidos is 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 worldwide.

In this role, you'll provide hands‑on network operations, troubleshooting, and engineering support across a complex global environment. You'll work with advanced networking technologies, resolve critical incidents, support network migrations, and help improve overall network performance and security.

We're looking for someone with strong enterprise networking experience, Cisco SD-WAN expertise, and the ability to troubleshoot complex network issues in a mission‑critical environment.

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!

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Pay Range:Pay Range $92,300.00 - $166,850.00

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

About Leidos

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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Commitment to Non-Discrimination

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.