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

General Dynamics Information Technology (


  full-time   employee

Ft Belvoir
United States

  • Manages the functionality and efficiency of a group of computers running on one or more Linux / Solaris operating systems.
  • System Administration is done primarily from the CLI; Command Line Interface •Maintains the integrity and security of servers and systems.
  • Sets up administrator and service accounts.
  • Maintains system documentation.
  • May program or script in an various shell language(s).
  • Test and evaluate system functions and capabilities.
  • Provides advice and training to end-users and tier 1 team members.
  • Provides guidance and work leadership to less-experienced staff members.
  • Maintains current knowledge of relevant technologies as assigned.
  • Work independently without assistance and supervision •Perform the necessary research to resolve issues to conclusion •Communicate effectively both verbally and in written form to document actions •Majority of the work is M-F 8X5. Exact hours are flexible.
  • Be available for afterhours work; put in effort necessary to see things through.
  • Be a member of an on-call rotation
  • Participates in special projects as required.


5-8 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

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

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.

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

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.

Benefits of this Position:

  • Opportunity for Fast Growth within the program
  • Professional Development Assistance – Covering the Cost of Obtaining Professional & Technical Certifications (depending on program)
  • Educational Reimbursement – toward degree programs and individual coursework
  • 401K Match – with 100% vesting on day one
  • Health, Dental and Vision Coverage to keep you healthy, starting your first day
  • We know work-life balance is important, GDIT offers Paid Time Off, Plus 10 Paid Holidays
  • Parking and transit commuter benefits

Why Work at General Dynamics IT?

  • Work with top talent and some of the brightest minds in your field
  • Support missions that make a difference to our Nation
  • Become part of an organization that that is committed to the highest ethical standards in all that we do 
  • Thrive in the stability of a large organization, with the ability to move onto new opportunities, supporting different missions, building your career within GDIT
  • Want to move, or find a job close to home? We have positions in several locations in the United States and the world
  • Enjoy a culture that supports work-life balance

General Dynamics is a Fortune Blue Ribbon Company and Clearance Jobs Top 10 Government Contractor.


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.


GDIT is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.






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