• Type: Contract
  • Job #1686

Title: System Administrator Expert

Location: Chantilly

*Clearance: Active TS/SCI w/ Polygraph needed to apply *



Company Overview:

Cornerstone Defense, in partnership with our military, intelligence, and civil government customers, supports U.S. operations worldwide through the use of many different types of intelligence, satellite, and cyber technologies. Cornerstone’s Intelligence Sector provides solutions to the United States Government for information collection, operations, exploitation and dissemination, and research activities. Our Team specializes in software development, cloud architecture, systems and network engineering, systems integration, agile management, as well as targeting operations and intelligence analysis. Our support to our mission customers includes cyber network operations, exploitation and defense, signals intelligence, human intelligence, and critical missions and networks.




  • Responsible for configuring, operating, and maintaining the customer’s data analysis tools including configuration, risk, issue and opportunity management, schedule management, architecture management, and requirements management.
  • As part of this team, the System Administrator is responsible for configuring, building, installing and maintaining servers designed to process large databases with multiple applications across AWS environments.
  • TS/SCI w/ poly
  • 10 to 12 years with BS/BA (Degree in Computer Science or a related field (IT/Engineering/etc.), or 8 to 10 years with MS/MA, or 5 to 7 years with PhD.
  • Candidate must possess and active Top Secret/SCI w/Poly Clearance
  • Demonstrated experience with various hosting and developer operations (devops) technologies;
  • Demonstrated experience with AWS including AWS Solutions Architect or AWS Developer certification;
  • Knowledgeable in the administration of Linux servers, Microsoft SQL, MySQL, VMware virtualization technologies, Firewalls, VPNs
  • Professional experience scripting in some administrative language (PowerShell, Batch, Perl, etc.)
  • Managing AWS environments including EC2, S3, and RDS instances; setting up accounts; maintain and monitor PKI certs;
  • Installing software upgrades;
  • Maintaining operating system patches and virus scanning;
  • Performing technical evaluations, analysis, and technical improvements to maintain optimum performance of applications and databases;
  • Monitor and provide system problem resolution;
  • Maintain AWS capacity and performance planning; evaluate system changes to improve the system;
  • Employ configuration control and change coordination for upgrades and repairs in a manner that assures system performance as planned;
Desired Qualifications
  • Customer familiarity
  • Familiarity with Accreditation and Authorization processes
  • Experience with Zoomdata, ServiceNow, Ruby on Rails, MariaDB, Remedy, SharePoint, Sparx EA, JIRA

Equal Opportunity Employment
Cornerstone Defense is proud to be an Equal Opportunity Employer. We are committed to creating an inclusive working environment for all employees and to upholding diversity in our recruiting and hiring processes. All qualified applicants will receive equal consideration for employment without regard to sex, gender identity, sexual orientation, race, color, age, religion, national origin, physical or mental disability, protected Veteran status, or any other characteristic protected by law.

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