Quantico, Virginia

Secure our Nation, Ignite your Future

ManTech International Corporation provides innovative engineering and systems integration services that help our customers solve their toughest, most intractable problems.  National defense and homeland security clients depend on our rapid, cost-effective development of adaptable, interoperable, integrated solutions that provide high performance in quick-response scenarios. Join the ManTech team and become an integral member of a diverse team.


The Systems Administrator will maintain, update, and secure existing Linux systems and manage an existing Elasticsearch cluster in support of Cyber investigations and operations.  Candidate will be responsible for optimizing Elasticsearch and Linux systems to ensure optimum performance with minimal downtime.  Candidate may also be asked for creative contributions to improve existing processes and for surge support for various initiatives in areas related to their area of expertise.


Travel is not required.


Mandatory Qualifications:

  • TS/SCI Clearance
  • Security+ or the ability to obtain the certification within 90 days
  • Extensive experience working with Red Hat Enterprise Linux 6.X or 7.X, with a strong command-line interface (CLI) skillset.
  • Experience securing Linux systems, including conducting regular patches and updates and configuring ip-tables.
  • Familiarity with at least one common scripting language such as Python, Perl, bash, etc.


Preferred Qualifications:

  • Extensive experience building and maintaining Elasticsearch 5.X and/or 6.X solutions (or strong willingness to learn)
  • Experience optimizing Elasticsearch data structures to support structured and unstructured data.
  • Familiarity with the DIACAP and/or RMF accreditation processes, specifically with configuring Linux systems in compliance with the Security Technical Implementation Guides (STIGs).
  • Experience with maintaining a secure, standard OS build process.
  • Experience installing and managing PostgreSQL.

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.

If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access http://www.mantech.com/careers/Pages/careers.aspx as a result of your disability. To request an accommodation please click careers@mantech.com and provide your name and contact information.

Quantico, Virginia

ManTech was founded in 1968 to provide advanced technological services to the United States government. We began with a single contract with the U.S. Navy to develop war-gaming models for the submarine community. Over the years, our government's technology needs have increased dramatically in scope and sophistication, and we have grown to meet that challenge.


For more than 4 decades, we kept a careful eye on where emerging technologies were taking the government, and we developed the resources to master those technologies—by staying close to our customers and anticipating their needs, hiring talented professionals to propel us into the future, and acquiring companies with proven capabilities.


Today, we are a multi-billion-dollar public company that provides the innovation, adaptability, and critical thinking our government needs for success in defense, intelligence, law enforcement, science, administration, health, and other fields—throughout the nation and in many countries throughout the world. We are now applying the lessons learned in the unforgiving arena of national security to help the private sector protect networks and critical information.

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