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Networking System Administrator Jobs (NOW HIRING)

MANTECH

Network System Administrator

El Segundo, CA

$74K - $100K/yr

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 ...

MANTECH

Network System Administrator

El Segundo, CA · On-site

$74K - $100K/yr

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 ...

True Helix

System Administrator

Delmont, PA · On-site

System administrators also actively resolve problems and issues with cloud, computer, server, and network systems to limit work disruptions within the company. Responsibilities Include * Responsible ...

ManTech

Network System Administrator

El Segundo, CA · On-site

$107K - $179K/yr

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 ...

nLeague

System Administrator

Golden, CO · On-site

Requisition ID: 65328 System Administrator Client: State of Colorado - Jefferson County Duration ... Maintain network and security hardware and software. * Monitor network to ensure network ...

True Helix

System Administrator

Delmont, PA · On-site

System administrators also actively resolve problems and issues with cloud, computer, server, and network systems to limit work disruptions within the company. Responsibilities Include * Responsible ...

Kros-Wise

System Administrator

San Diego, CA

Overview We are seeking a mission-focused Systems Administrator to support Navy enterprise IT ... Document network/system configurations and standard operating procedures * Coordinate with ...

Kros-Wise

System Administrator

San Diego, CA · On-site

$100K - $135K/yr

Overview We are seeking a mission-focused Systems Administrator to support Navy enterprise IT ... Document network/system configurations and standard operating procedures * Coordinate with ...

Kros-Wise

System Administrator

San Diego, CA · On-site

$100K - $135K/yr

Overview We are seeking a mission-focused Systems Administrator to support Navy enterprise IT ... Document network/system configurations and standard operating procedures * Coordinate with ...

Global Resource Solutions, Inc.

$77K - $104K/yr

The Network/System Administrator III primary function is working within Special Access Programs (SAPs) supporting Department of Defense (DoD) agencies, such as HQ Air Force, Office of the Secretary ...

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All JobsNetworking System Administrator Jobs

Networking System Administrator information

See salary details

$41K

$88.9K

$137.5K

How much do networking system administrator jobs pay per year?

As of Jun 10, 2026, the average yearly pay for networking system administrator in the United States is $88,927.00, according to ZipRecruiter salary data. Most workers in this role earn between $70,000.00 and $104,000.00 per year, depending on experience, location, and employer.

What is the difference between Networking System Administrator vs Network Engineer?

AspectNetworking System AdministratorNetwork Engineer
CertificationsCompTIA Network+, Cisco CCNACompTIA Network+, Cisco CCNA, CCNP
Work EnvironmentMaintains and supports existing network infrastructureDesigns and implements new network solutions
Primary FocusNetwork stability, troubleshooting, and daily operationsNetwork design, planning, and deployment
Employer & Industry UsageIT departments across various industriesTelecommunications, large enterprises, network consulting

While both roles involve network knowledge, Networking System Administrators focus on maintaining and troubleshooting existing networks, whereas Network Engineers are responsible for designing and implementing new network solutions. The roles often overlap, but their primary responsibilities and focus areas differ.

More about Networking System Administrator jobs
What cities are hiring for Networking System Administrator jobs? Cities with the most Networking System Administrator job openings:
What states have the most Networking System Administrator jobs? States with the most job openings for Networking System Administrator jobs include:
What job categories do people searching Networking System Administrator jobs look for? The top searched job categories for Networking System Administrator jobs are:
Networking System Administrator jobs near you
Infographic showing various Networking System Administrator job openings in the United States as of June 2026, with employment types broken down into 27% Full Time, 64% Part Time, and 9% Contract. Highlights an 94% Physical, 2% Hybrid, and 4% Remote job distribution, with an average salary of $88,927 per year, or $42.8 per hour.
Network System Administrator

Network System Administrator

MANTECH

El Segundo, CA

$74K - $100K/yr

Other

Posted 5 days ago

ManTech rating

8.8

Company rating: 8.8 out of 10

Based on 13 frontline employees who took The Breakroom Quiz

32nd of 188 rated software companies

Job description

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 provide technical guidance and quickly resolve network or desktop support issues.
  • Perform periodic system maintenance, hardware upgrades and replacements, firmware updates, and system configuration changes.
  • Manage the scheduled data backup library, including executing tape backups and arranging safe storage at customer locations or off-site facilities.
  • Prepare systems for operational use, support operational tests, and attend planning and requirements meetings with program managers and stakeholders.
  • Must meet position and certification requirements outlined in DoD Directive 8570.01-M for Information Assurance Technician Level 2 (IAT Level II) within 6 months of hire (e.g., Security+ CE, CCNA, CySA+, CND).

Minimum Qualifications:

  • Bachelor’s degree in a related technical area; an additional 4 years of related experience might be substituted for a degree.
  • 6+ years of total related experience
  • 4+ years of relevant SCI or SAP experience.

Preferred Qualifications:

  • Thorough knowledge of Microsoft Windows Server (2000/2003/2007), Microsoft Exchange Server 2003, and Windows XP/Vista operating systems administration and associated hardware.
  • Applicable Windows professional certifications based on OS requirements for the supported organization.
  • Working knowledge of Local Area Network (LAN) and Wide Area Network (WAN) technologies, data backup systems, and communication security (COMSEC) integration.
  • Working knowledge of JAFAN 6/0, DCID/JAFAN 6/3, DCID/JAFAN 6/9, and Joint DODIIS/Cryptologic SCI Information Systems Security Standards, Common Criteria, and System Security Policy as they relate to C&A for legacy systems.
  • Experience with PL1 & PL2 systems, familiarity with PL3 & PL4 cross-domain solutions, and deep familiarity with security policies, manual ICDs, JAFANs, and DoD Manuals.

Clearance Requirements:

  • An active Top Secret clearance with SCI eligibility is required to start.
  • Applicants must be eligible for access to Special Access Programs (SAPs).
  • Must have a willingness to submit to a Counterintelligence polygraph examination.

Travel:

This role requires regular travel within the organizational Area of Responsibility, which may include both air and ground transportation.

Physical Requirements:

  • Must be able to remain in a stationary position 50% of the time in closed-area offices.
  • Must be able to lift up to 50 pounds.
  • Need to occasionally move about inside and outside the office to access files, cabinets, or safes, and to install or remove computer-related equipment.

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