Senior Linux Engineer - TS/SCI with Polygraph

Clearance Level
Top Secret SCI + Polygraph
Systems Engineering
Chantilly, Virginia

REQ#: RQ137688

Travel Required: Less than 10%
Requisition Type: Regular

General Dynamics Information Technology (GDIT) is seeking an IT Engineer with experience building and maintaining Linux operating systems to join our team in support of a Federal Intelligence Agency contract.  In addition to receiving a competitive salary and generous health and personal benefits, the IT Engineer will enhance their skill set among a talented and technically accomplished group of colleagues.  Primary responsibilities include providing engineering and administrative support maintaining multiple large Enterprise environments. The supporting infrastructure includes multiple networks spanning multiple security enclaves within a hybrid (Windows & Linux) operating environment.

Job Responsibilities & Duties:

System Engineering duties include management of both physical and VDI based Linux workstations and servers.

  • Identify, design, document, and implement solutions using FOSS, COTS and GOTS products to enhance and meet customer requirements within the operating environment.

  • Identify, troubleshoot, analyze, and resolve related incidents with both short-term workarounds and long-term solutions.

  • Support, mentor, and assist remote Tier 1-3 administrative staff with operational incidents and procedures.

  • Work directly with software and hardware vendors where appropriate.

  • Communicate effectively (in oral and written form) with a variety of individuals and team members in both small and large team environments.



  • Active TS/SCI and CI Polygraph security clearance are required.

  • A combination of a degree based higher education, technical training, or work/military experience in a related field such as computer science, systems administration or systems engineering or equivalent experience.

  • 5+ years of related systems engineering or administration experience.

  • Candidate must possess an appropriate and current DoD Information Assurance (IA) Certification to be considered for employment; either valid CompTIA Security+ CE, Systems Security Certified Practitioner (SSCP) or Cisco Certified Network Associate (CCNA)-Security. CompTIA Security+ CE Certification is the preferred certification. In addition, candidate must attain the required DoD 8570 Computing Environment (CE) Training within six (6) months of Hire Date.


Successful candidates are expected to have related experience with:

  • Linux Operating systems as a server or workstation such as Red Hat Enterprise Linux, CentOS, Scientific Linux, Fedora, Oracle Linux, Rocky Linux, Alma Linux, or other distributions.

  • Strong operational understanding of core concepts like DNS, DHCP, and LDAP.

  • Technical experience with Kerberos Authentication concepts and/or Microsoft Active Directory domain joined servers and workstations is a plus (SSSD, WinBind, etc.)

  • Operating system deployment and Configuration Management via Red Hat Satellite, Foreman/Katello and/or Ansible Tower

  • Understanding of SMB/CIFS and NFS file sharing protocols

  • Ability to read and write shell scripts in a language like Python, Perl, Ruby, or Bash.

  • Configuration management coding and use of Anaconda Kickstart, Ansible, Puppet, Chef or other configuration as code products and version control with a code repository such as Gitlab.

  • Experience reviewing and applying DoD STIG security hardening

The following knowledge/skill set is not required but is a plus:

  • Knowledge of cloud technologies and environments like AWS, Azure and container technologies like Docker.

  • Knowledge of virtualization environments like VMware and Citrix.

  • Experience with other operating systems including other Linux distributions, Unix Distributions and Microsoft Windows.

  • Experience with storage appliances like NetApp or Isilon.

  • Exposure to performance monitoring tools used to tune and troubleshoot systems.

  • Ability to identify, troubleshoot and resolve issues related to networking concepts such as web proxies and firewall.

  • Installation, configuration and management of CUPS print server.

  • Familiarity with specific customer and mission.

  • Willingness to travel.

About Our Work

We are GDIT. The people supporting some of the most complex government, defense, and intelligence projects across the country. We deliver. Bringing the expertise needed to understand and advance critical missions. We transform. Shifting the ways clients invest in, integrate, and innovate technology solutions. We ensure today is safe and tomorrow is smarter. We are there. On the ground, beside our clients, in the lab, and everywhere in between. Offering the technology transformations, strategy, and mission services needed to get the job done.

COVID-19 Vaccination

GDIT does not have a vaccination mandate applicable to all employees. To protect the health and safety of its employees and to comply with customer requirements, however, GDIT may require employees in certain positions to be fully vaccinated against COVID-19. Vaccination requirements will depend on the status of the federal contractor mandate and customer site requirements.

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.