Network Engineer - TS / SCI Polygraph Required

Description

Leidos is searching for several Senior Network Engineers of varying experience levels to join our team in Chantilly, VA.

The team is made-up of highly technical and motivated individuals. The engineer for this role will assist in troubleshooting complex problems and implementing cutting-edge solutions. As such, this individual must be an excellent problem solver and work well in a collaborative team environment. Candidate must have proven hands-on experience working as a network engineer. OCONUS experience is highly desired.

50% travel to OCONUS location.

The program is made up of CONUS and OCONUS teams who regularly interact across varying time zones. As a result, the candidate must have excellent communication skills and be flexible with regards to teamwork and tasking. A demonstrated ability to perform in cross-functional teams to achieve results in a timely manner is desired.

Primary Responsibilities :

Install, configure, and troubleshoot network appliances (routers, switches, and firewalls)

Monitor entire network infrastructure (LAN & WAN) and provide regular reporting

Collaborate closely with the Chief Engineer to ensure network optimization and the completion of other tasks

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

Multiple Levels - Network Engineers Needed :

Bachelor's degree in network engineering, computer science, or related subject and between 8+ / 12+ / 15+ years minimum experience depending on education, training, skills and experience. Experience requirement may reduced with a Master's or Doctorate degree in network engineering, computer science, or related subject.

Must possess an active and in-scope TS / SCI With Poly to be considered

Active / current basic CCNA certification

Solid understanding of OSI or TCP / IP model

Hands-on experience with network monitoring, network diagnostics, and network analytics tools

Experience configuring / troubleshooting Cisco appliances

Experience configuring / troubleshooting routing and switching, including routing protocols

Experience writing scripts for Cisco switches, routers, and firewalls

Ability to work well individually, as well as within a team environment, and always maintain professional behavior with all stakeholders.

Ability to lift 50 lbs. and climb 30 ft.

Desired Qualifications :

CCNA / CCNP Security certification

Experience working with Cisco ASA / Firepower and Juniper SRX appliances

Experience implementing and troubleshooting IPSec VPN tunnels

Deep understanding of networking protocols, i.e., IPSEC, EIGRP, OSPF, QoS

Experience installing and troubleshooting iDirect VSATs

Experience using Solarwinds Performance Monitor and Configuration Manager

Experience implementing and troubleshooting AWS

Experience implementing and troubleshooting VoIP & PBX systems

Experience implementing and troubleshooting Asterisk

• This is a sourcing posting and the listed salary range may not be representative of final salary offered. The salary range may be adjusted according to the level of position for which you are selected.

Come break things (in a good way). Then build them smarter.

We're the tech company everyone calls when things get weird. We don't wear capes (they're a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for "how it's always been done."

Original Posting : August 4, 2025

For U.S. Positions : While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range :

Pay Range $112,450.00 - $203,275.00

The Leidos pay range for this job level is a general guideline onlyand 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.