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60 Mantech Network Systems Administrator Jobs Hiring Near You

ManTech

Network System Administrator

El Segundo, CA · On-site

$107K - $179K/yr

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 ...

ManTech

Systems Administrator

Eglin, FL

MANTECH seeks a motivated, career and customer-oriented System Administrator to join our Air Force ... network storage. * Provide support to users in the areas of account management, enterprise ...

ManTech

Systems Administrator

Eglin, FL

MANTECH seeks a motivated, career and customer-oriented System Administrator to join our Air Force ... network storage. * Provide support to users in the areas of account management, enterprise ...

MANTECH

Network System Administrator

El Segundo, CA · On-site

$74K - $100K/yr

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 ...

ManTech

Systems Administrator

Laurel, MD

$85K - $141K/yr

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team in ... Installs/loads operating system software, troubleshoot and maintain integrity and configure network ...

ManTech

Systems Administrator

Laurel, MD · On-site

$85K - $141K/yr

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team in ... Installs/loads operating system software, troubleshoot and maintain integrity and configure network ...

ManTech International

Systems Administrator

Laurel, MD · On-site

$85K - $141K/yr

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team in ... Installs/loads operating system software, troubleshoot and maintain integrity and configure network ...

ManTech

Systems Administrator

Silverdale, WA

$98K - $163K/yr

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team ... Diagnose and resolve hardware, software, network, and system issues * Modernize key infrastructure ...

ManTech International

Systems Administrator

Laurel, MD · On-site

$85K - $141K/yr

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team in ... Installs/loads operating system software, troubleshoot and maintain integrity and configure network ...

ManTech

RHEL Systems Administrator

Warrenton, VA

$107K - $179K/yr

MANTECH seeks a motivated, career and customer-oriented RHEL Systems Administrator (Cameo ... Knowledge of Cameo NoMagic software systems and a baseline understanding of networking concepts and ...

ManTech

RHEL Systems Administrator

Warrenton, VA

$107K - $179K/yr

MANTECH seeks a motivated, career and customer-oriented Linux Systems Administrator (Cameo ... Knowledge of Cameo NoMagic software systems and a baseline understanding of networking concepts and ...

ManTech International

Systems Administrator

Silverdale, WA · On-site

$98K - $163K/yr

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team ... Diagnose and resolve hardware, software, network, and system issues * Modernize key infrastructure ...

ManTech

Systems Administrator

Fort George G Meade, MD · On-site

$128K - $214K/yr

MANTECH seeks an experienced and passionate, career and customer-oriented Systems Administrator to ... Knowledge of network devices (routers, switches, gateways) and protocols such as TCP/IP, UDP, HTTP ...

ManTech

Senior Systems Administrator

Chantilly, VA

$107K - $179K/yr

MANTECH seeks a motivated, mission-oriented Senior Systems Administrator to join our team in ... Intermediate knowledge of networking principles and routing protocols * Ability to restore user ...

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ManTech Jobs Information

Do workers at ManTech get paid breaks?

Yes. Most people get paid breaks.
100% of people say they get paid breaks.
Based on data from 8 people who took the Breakroom Quiz between December 2024 and June 2026.

Does ManTech pay people when they’re sick?

Sometimes. Only some people get paid when they’re sick.
46% of people say they wouldn’t get paid if they were sick but scheduled to work.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and June 2026.

At ManTech, are sick days and vacation days separate paid time off?

Only some people have separate paid time off for sick days and vacation.
45% of people say they have to use vacation days when they’re out sick.
Based on data from 11 people who took the Breakroom Quiz between June 2025 and June 2026.

Is the health insurance from ManTech affordable enough for their workers?

Most people say the health insurance costs are okay.
83% of people say the health insurance costs are okay
Based on data from 6 people who took the Breakroom Quiz between March 2025 and June 2026.

Do people get paid time off at ManTech?

Most people get paid time off work.
100% of people say they get paid time off.
Based on data from 11 people who took the Breakroom Quiz between June 2025 and June 2026.

How far ahead of time do people find out their work schedule?

Most people find out their schedule less than four weeks ahead of time.
  • 80% of people with changing schedules find out their shifts one week or less ahead of time.
  • 20% of people with changing schedules find out their shifts two weeks ahead of time.
  • 0% of people with changing schedules find out their shifts three weeks ahead of time.
  • 0% of people with changing schedules find out their shifts four weeks or more ahead of time.

Based on data from 5 people who took the Breakroom Quiz between March 2025 and March 2026.

Do workers at ManTech worry about hours?

Most people don’t worry about getting enough hours.
100% of people report they don’t worry about getting enough hours.
Based on data from 6 people who took the Breakroom Quiz between December 2024 and March 2026.

Do ManTech workers get to choose the shifts they work?

Some people don’t get to choose which shifts they work.
50% report that they don’t have enough control over which shifts they work.
Based on data from 6 people who took the Breakroom Quiz between December 2024 and March 2026.

How easy is it for ManTech workers to change shifts?

Most people find it easy to change shifts.
80% of people report that it’s easy to change shifts if they need to.
Based on data from 5 people who took the Breakroom Quiz between March 2025 and March 2026.

How easy is it to get time off at ManTech?

Most people find it easy to get time off.
100% of people report it’s easy to get time off.
Based on data from 14 people who took the Breakroom Quiz between December 2024 and June 2026.

Do ManTech managers change schedules at the last minute?

Most managers don’t change people’s schedules at the last minute.
88% of people say their manager doesn’t change their shift schedule at the last minute.
Based on data from 8 people who took the Breakroom Quiz between December 2024 and March 2026.

Do jobs at ManTech spill into time workers aren’t paid for?

Rarely. The job doesn't usually spill into unpaid time.
25% of people report that their job takes up time that they don’t get paid for.
Based on data from 8 people who took the Breakroom Quiz between December 2024 and March 2026.

How easy is it to take sick days at ManTech?

Most people find it easy to take sick days.
100% of people report that it’s easy to take time off if they are sick.
Based on data from 14 people who took the Breakroom Quiz between December 2024 and June 2026.

Is working at ManTech good if you’re a parent or caregiver?

Most parents and caregivers say this is a good place to work.
100% of people who care for a child or other relative report this is a good place to work.
Based on data from 7 people who took the Breakroom Quiz between December 2024 and April 2026.

Do people at ManTech feel treated with respect by their managers?

Most people feel treated with respect by their managers.
93% of people say they’re treated with respect by their managers.
Based on data from 14 people who took the Breakroom Quiz between December 2024 and June 2026.

Do people at ManTech get to take their breaks without interruption?

Most people get breaks without interruption.
85% of people report that they get to take their breaks without interruption.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and June 2026.

Is it stressful to work at ManTech?

Some people feel stressed out here.
46% of people say they often feel stressed out at work.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and June 2026.

Do people at ManTech enjoy their jobs?

Most people enjoy their job.
89% of people report they enjoy their job.
Based on data from 9 people who took the Breakroom Quiz between December 2024 and June 2026.

Do people at ManTech recommend working with their team?

Most people recommend working with their team.
79% of people report that they would recommend working with their immediate team to a friend.
Based on data from 14 people who took the Breakroom Quiz between December 2024 and June 2026.

Do people get enough training when they start at ManTech?

Some people didn’t get enough training when they started.
43% of people report they didn’t get enough training when they started working here.
Based on data from 14 people who took the Breakroom Quiz between December 2024 and June 2026.

Do people get support to advance at ManTech?

Most people are given support to advance their career here.
In the last year, 67% of people report being given support to advance their career here.
Based on data from 12 people who took the Breakroom Quiz between December 2024 and June 2026.

Do people think ManTech’s headquarters understands what’s happening where they work?

Most people think headquarters doesn’t understand what’s happening where they work.
69% of people think that this employer’s headquarters or owners don’t have a good understanding of what’s really happening where they work.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and June 2026.

Do workers feel well informed about how ManTech is doing?

Most people feel well informed about how the company is doing.
69% of people feel that they are kept well informed about how the company is doing as a whole.
Based on data from 13 people who took the Breakroom Quiz between December 2024 and June 2026.
What other companies are hiring for Network Systems Administrator jobs?
What are the most popular jobs at Mantech?
What are the most popular categories at Mantech?
Infographic showing various Network Systems Administrator job openings at Mantech in the United States as of July 2026, with employment types broken down into 100% Full Time. Highlights an 93% Physical, 1% Hybrid, and 6% Remote job distribution.
Network System Administrator

Network System Administrator

ManTech

El Segundo, CA • On-site

$107K - $179K/yr

Other

Medical, Life, Retirement, PTO

Posted 24 days ago

ManTech rating

9.0

Company rating: 9.0 out of 10

Based on 14 frontline employees who took The Breakroom Quiz

33rd of 245 rated software companies

Job description

Description & Requirements
Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we've been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now-protect and innovate with MANTECH!

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.

The projected compensation range for this position is $107,900.00-$179,400.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.  In addition, MANTECH invests in its employees beyond just compensation.  MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.
If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.

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