Systems Administrator Senior - TS/SCI with Polygraph - Military veterans preferred

General Dynamics Information Technology (


  full-time   employee

Ft Belvoir
United States

  1. Manages the functionality and efficiency of a group of computers running on one or more operating systems.
  2. Maintains the integrity and security of servers and systems.
  3. Sets up administrator and service accounts.
  4. Maintains system documentation
  5. Interacts with users and evaluates vendor products.
  6. Makes recommendations to purchase hardware and software, coordinates installation and provides backup recovery.
  7. Develops and monitors policies and standards for allocation related to the use of computing resources.
  8. May program in an administrative language.
  9. Develops and implements testing strategies and document results.
  10. Provides advice and training to end-users.
  11. Provides guidance and work leadership to less-experienced staff members.
  12. Maintains current knowledge of relevant technologies as assigned.
  13. Participates in special projects as required.


5+ years of directly related experience in systems administration and analysis.


  • UNIX/LINUX System Administration Required •System Administration is done primarily from the CLI; Command Line Interface

Must possess appropriate, current DoD Information Assurance (IA) Certification to be considered for employment; either valid CompTIA Security+ CE OR CCNA-Security certification. Security+ CE Certification preferred. In addition, must attain the required DoD 8570 Computing Environment (CE) Certification within six (6) months of Hire Date.


As part of your role/function on the program, you will be granted privileged user access. Privileged Users are subject to greater scrutiny as a direct result of the significant responsibilities placed upon them. Please be aware that because of these critical duties, you will be subject to additional IT system monitoring, and supervisory evaluation to ensure continuous adherence to Privileged User processes and procedures. Privileged Users are subject to a zero tolerance policy for security violations.

Due to the sensitive nature of the work being done for this government client, all candidates must hold a TS/SCI with Polygraph. 


Unix shell command competency – beyond basic user level; should be able to:

  • Interpret scripts as to their function
  • Manipulate and edit files using copy, scp, diff and vi.
  • Control and determine the state of services and daemons •Manage process control •Perform filesystem management (mount, unmount, fsck, swap, and mkfs, etc)


All Candidates should have familiarity / working knowledge of the following processes and concepts:

  • Automountd
  • NFS
  • DNS
  • Ethernet networking and TCP/IP
  • Syslog
  • Cron

ADVANCED candidates should have the knowledge of

  • Sendmail, IMAP
  • ZFS administration
  • Udev
  • Nameservices, NIS, NIS+, LDAP
  • Xwindow services
  • Printer Configurations (CUPS)
  • Multipath
  • Logical volume administration
  • Disk Partitioning
  • Zone administration
  • Clustered filesystems

General Dynamics Information Technology solves our customers’ challenges through future-focused technology and services, ingenuity and deep mission-knowledge. Partnering with government, defense, the intelligence community, industry leaders and cutting-edge technology companies, we deliver solutions that make a difference – helping our customers to advance mission performance, transform operations and discover opportunities to build a better future.


Bachelor’s Degree in Computer Science or a related technical discipline, or the equivalent combination of education, technical certifications or training, or work experience.