• Location: Annapolis Junction, Maryland
  • Type: Contract
  • Job #2627

Title: Linux System Administrator
Location: Annapolis Junction, MD
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *

Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government.  Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission.  Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems.  If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.

6 years of experience with all facets of Linux system administration to include:

  •     RedHat / CentOS / Oracle
  •     Management of: Users & File Systems, Backups, Patches, Security, Networks
  •     Hardware administration/troubleshooting/installation
  •     Software installation, administration & troubleshooting
  •     Performance tuning

6 years of experience with all facets of administering a production system:

  •     System accreditation processes:
  •         System hardening
  •         Preparation for penetration and vulnerability testing
  •     System Monitoring & Health monitoring & Troubleshooting
  •     Use of customer’s: software repositories, authentication services, network services, COOP facilities, SSP & asset management systems

Fluent in:

  •     Bash/Perl/etc. scripting

Awareness of:

  •     Git/software configuration management
  •     Docker
  •     Puppet

Professional skills:

  •     Effective communications skills & documentation skills
  •     Ability to work with large team of developers
  •     Ability to manage a small team of administrators
  •     Willingness to take direction
  •     Willingness to interact with customer watch facilities
  •     Understanding/appreciation of customer mission requirements


  • Principal Consultant is a mid-level member of a project team assisting with implementation and testing of individual components of the Oracle product or technology based on guidance from the lead. Assists with the development and configuration of detailed solutions based on customer requirements. Assists in operations and maintenance of the customer system.


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