Senior Windows Systems Administrator - Military veterans preferred

ManTech (


  full-time   employee

United States

Secure our Nation, Ignite your Future

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first.  At ManTech International Corporation, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer-oriented Senior Windows Systems Administrator to join our team in McLean, Virginia.


The on-site system administrators shall support the day-to-day operations of the Sponsor's Laboratory computer systems. This support shall include the installation, configuration, maintenance, failure analysis and recovery, performance monitoring, data storage management, and security management of laboratory computer systems.  System administrators shall utilize at least one, preferably two, administrative languages (shell, PERL, Tk, Powershell, Python, etc.), and shall have a functional knowledge of Windows operating systems in the conduct of their duties. System administrators shall have functional knowledge of distributed and clustered computing environments, cloud computing and virtualization environments.

Responsibilities include, but are not limited to:

  • Responding to inquiries concerning all aspects of computer and network operations
  • Creating and managing accounts
  • Installing, configuring, updating, and removing system and application software
  • Installing, configuring, and removing system hardware (servers, workstations, monitors, printers, plotters, scanners, transceivers, network interface cards, network physical links, etc.)
  • Configuring NFS, NIS, SAMBA, etc. remote hosting/sharing protocols
  • Backing up and restoring files
  • Monitoring and allocating system resources (central processing unit (CPU), memory, and storage space)
  • Auditing system log files to include compliance audits
  • Diagnosing and troubleshooting hardware and software problems
  • Documenting hardware and software configurations, maintenance history, backup history
  • Implementing up-to-date system policies and procedures
  • Updating/patching system operating systems
  • Utilizing existing DEVOPS capabilities such as the continuous integration/continuous delivery (Cl/CD) to shorten systems development lifecycle
  • Familiarity with software configuration management tools such as Puppet, Ansible, etc.
  • Implementation and management of new and existing Active Directory services

Basic Qualifications:

  • Bachelor's Degree in computer science, information systems, engineering, mathematics, or four (4) years equivalent experience in an IT discipline.  Equivalent military training and experience in an information technology field is acceptable.
  • Seven (7) years’ experience as a system administrator
  • Five (5) years direct customer experience working as a system administrator

Security Clearance Requirements:

  • TS/SCI with polygraph

Physical Requirements:

  • Must be able to remain in a stationary position 50%.
  • Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.
  • Often positions self to maintain computers in the lab, including under the desks and in the server closet.
  • Frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.
  • May be asked to move Audio/Visual or Computer equipment weighing up to 50 pounds across and/or around a business campus or large facility.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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