• Location: Annapolis Jct, Maryland
  • Type: Contract
  • Job #1754


Title: Systems Administrator
Location: Annapolis Junction, MD

*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.


10 years overall IT experience with at least 5 years’ experience in a production System Administration role.  Required skills and working knowledge in these technologies:

Linux – CentOS/RHEL) administrator concepts and principles

  • Storage
    • Management (ex LG, PV, LVM
    • Protocols (ex NFS, SAMBA, ISCSI)
    • SAN Storage configuration
    • Understanding of network storage (ex. NAS and SAN)
  • Networking
    • Understanding of networking concepts and principles
    • Routing, IPSec
  • Security Compliance
    • YUM Patching
    • IAVA Remediation
    • Server certificate management
    • Automation (ex. Puppet, SALT)
    • SELinux
  • Authentication
    • Users and Group Management
    • Understanding of Active Directory and DNS
    • User certificate management
  • Scripting: Shell, Python preferred
  • VMware VM creation/configuration/operation experience
  • Physical Server Administration
  • CompTIA Security+ 2 Certification.  If none than must obtain within three months of starting

Other Desired Skills, Education, or familiarization

  • Oracle Database and possibly some DBA experience
  • Oracle WebLogic
  • JavaScript Object Notation (JSON) 

Desired Skills/Qualifications: 

  • Minimum General Experience: Combination of ten (10) years systems, network, or storage administration experience on any one specific vendor¿s or a combination of vendors technology. May include knowledge of or specialization with any of the following: Solaris/Trusted Solaris/Linux/ or other Unix or Windows operating system; Storage technology including Disc/Tape/SAN/NAS/DAS.
  • Functional Responsibility: Provides advanced system administration and support of workstations, file servers, printers, storage or network infrastructure. Troubleshoots difficult technical problems; creates, maintains and modifies processes/policies/procedures, resolves day to day issues for the user community. In addition, provides advanced skills and process transfer to the customer and establishes process and procedures for improving customer IT or MIS operations. Can work without supervision and may periodically serve as a Technical Lead.
  • Minimum Education: A BS degree in computer science or a related discipline or equivalent experience and relevant vendor training on specific technologies and equivalent years of experience.
  • working Jenkins, Docker, Make and deployment scripting.

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.

Attach a resume file. Accepted file types are DOC, DOCX, PDF, HTML, and TXT.

We are uploading your application. It may take a few moments to read your resume. Please wait!