Senior Network Engineer - TS/SCI | OCONUS Travel

Leidos Inc; Chantilly (VA); On-site; USD 131,300 - 237,350; Full time

Job summary

Leidos Inc. in Chantilly, VA seeks an experienced Network Engineer to join a high‑standard team. The role focuses on installing, configuring, and troubleshooting network appliances, monitoring LAN/WAN, and collaborating with the Chief Engineer to optimize performance and security.

The candidate must hold an active TS/SCI with Poly clearance, have hands‑on Cisco experience, and be willing to travel OCONUS up to 50%. OCONUS travel and cross‑time‑zone collaboration are common in this program.

Qualifications

• Master's degree with 12+ years of network engineering experience; PhD may reduce requirement.
• Active TS/SCI with Poly clearance required.
• Active CCNA certification.
• Strong OSI or TCP/IP knowledge.
• Hands-on with network monitoring, diagnostics, and analytics tools.
• Experience configuring/troubleshooting Cisco appliances and routing/switching.

Responsibilities

• Install, configure, and troubleshoot network appliances (routers, switches, firewalls).
• Monitor LAN/WAN and provide regular reporting.
• Collaborate with Chief Engineer for network optimization.
• Ensure network uptime, performance, and security.
• Document and enforce network standards.
• Manage and maintain IP addressing schema.
• Travel OCONUS as needed.
• Maintain network lab in Chantilly, VA.

Skills

Network troubleshooting

Cisco devices

TCP/IP networking

Network monitoring tools

Scripting for network devices

Clearance TS/SCI

Education

Master's degree in network engineering or related field

Doctorate in network engineering or related subject (optional/reduction)

Tools

Cisco ASA/Firepower

Juniper SRX

SolarWinds

AWS

VoIP PBX systems

Asterisk

Job description

Leidos Inc. in Chantilly, VA seeks an experienced Network Engineer to join a high‑standard team. The role focuses on installing, configuring, and troubleshooting network appliances, monitoring LAN/WAN, and collaborating with the Chief Engineer to optimize performance and security.

The candidate must hold an active TS/SCI with Poly clearance, have hands‑on Cisco experience, and be willing to travel OCONUS up to 50%. OCONUS travel and cross‑time‑zone collaboration are common in this program.