Network Engineer

Leidos LLC; Chantilly (VA); On-site; USD 108,000 - 195,000; Full time

Job summary

Leidos in Chantilly, VA is seeking an experienced and fully cleared Network Engineer to join our team. The role involves installing, configuring, and troubleshooting network appliances, monitoring LAN and WAN, and ensuring uptime, performance, and security across the network.

The ideal candidate will have an active TS/SCI with Poly, 8+ years of relevant experience (or 6+ years with a Master’s) and willingness to travel up to 50% to CONUS/OCONUS locations.

Qualifications

• Active TS/SCI with Poly is required.
• Strong understanding of OSI or TCP/IP models.
• Hands-on experience with network monitoring, diagnostics, and analytics tools.
• Experience configuring/troubleshooting Cisco devices (routers, switches, firewalls).
• Willingness to travel up to 50% to CONUS/OCONUS locations.

Responsibilities

• Install, configure, and troubleshoot network appliances (routers, switches, and firewalls).
• Monitor LAN & WAN and provide regular reporting.
• Collaborate with Chief Engineer to optimize network and complete tasks.
• Ensure network uptime, performance, and security.
• Document and enforce network standards.
• Manage and maintain IP addressing schema.
• Travel 50% to OCONUS locations as needed.
• Maintain network lab in Chantilly, VA.

Skills

Active TS/SCI with Poly

Cisco routers/switches

Network monitoring

Teamwork & communication

Education

Bachelor's degree

Master's degree

Tools

Solarwinds

Cisco ASA

Juniper SRX

AWS networking

Job description

Leidos delivers solutions through the work of a diverse, dedicated team focused on our customers' success. We're looking for people who want to do work that matters, on a team that sticks around because the problems are worth solving.

Our team is seeking an experienced and fully cleared Network Engineer to join our team in Chantilly, VA. 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. 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 - 50% travel to OCONUS location.
• Maintain network lab in Chantilly, VA

Bachelor's degree and at least 8 years minimum experience depending on education, training, skills and experience OR Masters and at least 6 years of experience. Experience requirement may be reduced with 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 #MSBA

Pay and Benefits:

Original Posting: September 18, 2026

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 $107,900.00 - $195,050.00

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.

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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

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 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.