GCI is hiring: Network Engineer Sr (TS/SCI with Poly Required) in Reston
GCI, Reston, VA, United States
Network Engineer Sr (TS/SCI with Poly Required) Job Category: Network Engineering
Requisition Number: NETWO001970
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Posted: February 27, 2026
Full-Time
On-site
Salary Range: 110,260.8 to 184,142.4
Locations Virginia, USA
Description The Network Engineer is responsible for designing technical solutions for complex network infrastructure. The candidate will define network architecture to support the implementation of secure and reliable networks. The candidate will be responsible for ensuring that technical solutions leverage industry best practices and are designed to meet industry accepted security requirements. Candidate should be able to define internal and external customer IT infrastructure and architecture needs and then design solutions to meet those needs including capacity planning, systems configuration and tuning, monitoring network performance, and installations of hardware/software. The candidate should have experience in defining, maintaining, and upgrading the overall security posture of the networks.
GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.
At GCI, we solve the hard problems. As a Network Engineer, a typical day will include the following duties:
Key Responsibilities Designs and plans network communications to include on-prem and cloud-based systems
Provides specifications and detailed schematics for network architecture
Plans implementation of enhancements and security upgrades to the network
Conducts hands‑on setup, configuration, testing, and troubleshooting of on‑site network infrastructure
Conducts testing of network infrastructure using industry practices
Monitors network hardware and virtual (cloud) device operations to ensure properly functioning networks and capabilities
Advises network users of hardware needs, configurations, and limitations
Provides troubleshooting assistance and guidance to other team members as well as end users of the network(s)
Provides detailed recommendations for hardware and software selection, implementation techniques, and tools
Provides technical expertise in all areas of network and computer hardware and software interconnection and interfacing, such as routers, switches, firewalls, bridges, gateways, etc.
Evaluates and reports on changing or end of life technologies to ensure capabilities of the network remain up to date and secure
Required Qualifications Experience in IPSec site-to-site VPN
Experience in Remote access VPN
Experience configuring, designing, maintaining, and troubleshooting LAN/WAN devices
Thorough understanding of network routing concepts (EIGRP, OSPF, BGP, IP MPLS)
Basic understanding of QoS concepts
Experience with network monitoring technologies
Expertise in deploying Cisco, or Juniper firewall Manager servers
Experience engineering and deploying cloud-based and on-prem network firewall solutions
Experience designing, engineering, and deploying controlled interfaces
Ability to take customer requirements or problems and convert them into technical solutions
Ability to partner with systems administrators to solve complex problems
Complex problem management research and issue resolution
Desired Qualifications Experience configuring, designing, and troubleshooting QoS in LAN or WAN devices
Experience design, engineering, and deploying Multi‑Factor Authentication solution
*A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance.
Equal Opportunity Employer. Individuals with Disabilities. Protected Veterans. This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.
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Requisition Number: NETWO001970
Apply now
Posted: February 27, 2026
Full-Time
On-site
Salary Range: 110,260.8 to 184,142.4
Locations Virginia, USA
Description The Network Engineer is responsible for designing technical solutions for complex network infrastructure. The candidate will define network architecture to support the implementation of secure and reliable networks. The candidate will be responsible for ensuring that technical solutions leverage industry best practices and are designed to meet industry accepted security requirements. Candidate should be able to define internal and external customer IT infrastructure and architecture needs and then design solutions to meet those needs including capacity planning, systems configuration and tuning, monitoring network performance, and installations of hardware/software. The candidate should have experience in defining, maintaining, and upgrading the overall security posture of the networks.
GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.
At GCI, we solve the hard problems. As a Network Engineer, a typical day will include the following duties:
Key Responsibilities Designs and plans network communications to include on-prem and cloud-based systems
Provides specifications and detailed schematics for network architecture
Plans implementation of enhancements and security upgrades to the network
Conducts hands‑on setup, configuration, testing, and troubleshooting of on‑site network infrastructure
Conducts testing of network infrastructure using industry practices
Monitors network hardware and virtual (cloud) device operations to ensure properly functioning networks and capabilities
Advises network users of hardware needs, configurations, and limitations
Provides troubleshooting assistance and guidance to other team members as well as end users of the network(s)
Provides detailed recommendations for hardware and software selection, implementation techniques, and tools
Provides technical expertise in all areas of network and computer hardware and software interconnection and interfacing, such as routers, switches, firewalls, bridges, gateways, etc.
Evaluates and reports on changing or end of life technologies to ensure capabilities of the network remain up to date and secure
Required Qualifications Experience in IPSec site-to-site VPN
Experience in Remote access VPN
Experience configuring, designing, maintaining, and troubleshooting LAN/WAN devices
Thorough understanding of network routing concepts (EIGRP, OSPF, BGP, IP MPLS)
Basic understanding of QoS concepts
Experience with network monitoring technologies
Expertise in deploying Cisco, or Juniper firewall Manager servers
Experience engineering and deploying cloud-based and on-prem network firewall solutions
Experience designing, engineering, and deploying controlled interfaces
Ability to take customer requirements or problems and convert them into technical solutions
Ability to partner with systems administrators to solve complex problems
Complex problem management research and issue resolution
Desired Qualifications Experience configuring, designing, and troubleshooting QoS in LAN or WAN devices
Experience design, engineering, and deploying Multi‑Factor Authentication solution
*A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance.
Equal Opportunity Employer. Individuals with Disabilities. Protected Veterans. This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.
#J-18808-Ljbffr