Network System Administrator
Location
El Segundo, CA
Job Type
Full-time
Category
other-general
Posted
June 15, 2026
MANTECH seeks a motivated, career and customer-oriented **Network/System Administrator (NSA) -III** to join our team in **El Segundo, CA** .
The Network/System Administrator (NSA) -III will leverage their strong technical background and knowledge to support Special Access Programs (SAPs) and other classified networks supporting SSC Directorates and/or AFSPC Operational Units. This role supports day-to-day operations for Collateral, Sensitive Compartmented Information (SCI), and Special Access Program (SAP) activities in a five-day-a-week, in-office environment.
**Responsibilities include but are not limited to:**
+ Install, maintain, audit, and support a secure MS Windows network environment, file servers, firewalls, and network access while troubleshooting anomalies to ensure optimum performance.
+ Maintain internet applications and protocols including IP, TCP, HTTP, HTTPS, FTP, and SSL.
+ Interface directly with local customers and IT staff to prov...
The Network/System Administrator (NSA) -III will leverage their strong technical background and knowledge to support Special Access Programs (SAPs) and other classified networks supporting SSC Directorates and/or AFSPC Operational Units. This role supports day-to-day operations for Collateral, Sensitive Compartmented Information (SCI), and Special Access Program (SAP) activities in a five-day-a-week, in-office environment.
**Responsibilities include but are not limited to:**
+ Install, maintain, audit, and support a secure MS Windows network environment, file servers, firewalls, and network access while troubleshooting anomalies to ensure optimum performance.
+ Maintain internet applications and protocols including IP, TCP, HTTP, HTTPS, FTP, and SSL.
+ Interface directly with local customers and IT staff to prov...