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Network System Administrator Jobs (NOW HIRING)

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 ...

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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 ...

GRS, Inc.

Network/System Administrator III

Boston, MA · On-site

$76K - $102K/yr

Global Resource Solutions, Inc. (GRS) is seeking an enthusiastic and motivated individual for the position of Network/System Administrator III. The primary function of this role is to support ...

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How much do network system administrator jobs pay per year?

As of Jun 6, 2026, the average yearly pay for network system administrator in the United States is $83,055.00, according to ZipRecruiter salary data. Most workers in this role earn between $70,000.00 and $94,500.00 per year, depending on experience, location, and employer.

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

AspectNetwork System AdministratorNetwork Engineer
CertificationsCompTIA Network+, Cisco CCNACCNA, CCNP, Cisco certifications
Work EnvironmentMaintains and supports existing networksDesigns and implements new network solutions
Primary FocusNetwork maintenance, troubleshooting, and supportNetwork design, planning, and development
Employer UsageIT departments, service providersTelecom companies, large enterprises

While both roles involve networking, the Network System Administrator primarily manages and supports existing network infrastructure, ensuring stability and security. In contrast, the Network Engineer focuses on designing and building new networks or upgrading existing ones. Both roles require similar certifications and often work within the same industry environments, but their core responsibilities differ in scope and focus.

What are Network System Administrators?

Network System Administrators are IT professionals responsible for managing, maintaining, and troubleshooting computer networks within an organization. They ensure the security, reliability, and optimal performance of network systems, including servers, routers, switches, and other hardware. Their duties often include installing network software, monitoring network activity, performing backups, and responding to outages or security breaches. By keeping networks running smoothly, they help organizations communicate and operate efficiently.

What are the key skills and qualifications needed to thrive as a Network System Administrator, and why are they important?

To thrive as a Network System Administrator, you need a solid understanding of networking protocols, system administration, cybersecurity principles, and typically a degree in computer science or a related field. Familiarity with tools like Cisco routers, firewalls, network monitoring software, and certifications such as CompTIA Network+, Cisco CCNA, or Microsoft Certified: Windows Server are common requirements. Strong problem-solving skills, attention to detail, and effective communication are vital soft skills for this role. These abilities ensure secure, reliable, and efficient network operations essential to organizational productivity and data protection.

What are some common challenges faced by Network System Administrators and how can they be addressed?

Network System Administrators often face challenges such as managing network security, minimizing downtime, and keeping up with rapidly changing technologies. They must proactively monitor systems to identify vulnerabilities and respond quickly to incidents, often outside regular business hours. Staying current with certifications and industry trends, as well as fostering strong communication with IT and non-IT staff, can help address these challenges and ensure the network runs smoothly.
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Network System Administrator jobs near you
Infographic showing various Network System Administrator job openings in the United States as of May 2026, with employment types broken down into 1% As Needed, 70% Full Time, 24% Part Time, 1% Temporary, and 4% Contract. Highlights an 93% Physical, 2% Hybrid, and 5% Remote job distribution, with an average salary of $83,055 per year, or $39.9 per hour.
Network System Administrator

Network System Administrator

MANTECH

El Segundo, CA • On-site

$74K - $100K/yr

Other

Posted yesterday

ManTech rating

8.8

Company rating: 8.8 out of 10

Based on 13 frontline employees who took The Breakroom Quiz

31st of 186 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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