> Markdown version of [/jobs/ext/1989800-senior-system-administrator-ts-sci-w-polygraph](https://www.wearedevelopers.com/jobs/ext/1989800-senior-system-administrator-ts-sci-w-polygraph). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior System Administrator-TS/SCI w/Polygraph - **Company:** General Dynamics Information Technology - **Location:** Reston, VA, United States - **Experience:** Expert - **Salary:** $147,292.0 - $199,278.0 - **Contract:** Permanent contract - **Skills:** Active Directory, Domain Controllers, Backup Devices, Bash Shell, CentOS, CompTIA Security+, Dynamic Host Configuration Protocol, Linux, Disaster Recovery, Domain Name System (DNS), Integrated Development Environments, Linux System Administration, System Center Configuration Manager, Windows Servers, Windows PowerShell, Red Hat Enterprise Linux, Ansible, Server Administration, Software Configuration Management, Software Deployment, Windows Desktop, Scripting, Enterprise Software Applications, Information Technology, Nutanix, Vmware - **Published:** August 8, 2026 - **Apply:** https://dejobs.org/x/x/BE7729047B704F9482FD832B86E3EE09/job/ ## About the Role Backup and Recovery,Computer Backups,Disaster Recovery (DR),Information Technology (IT) Systems Certifications: CompTIA Security+ CE | CompTIA - CompTIA Experience: 10 + years of related experience, * Ability to write scripts using PowerShell and/or Bash. * Experience managing VMware, Nutanix, and other types of enterprise level Virtual Infrastructures. * Proficient in managing and troubleshooting Active Directory and Group Policy Object (GPO). * At least 10 years of relevant experience. * Security + Certified; Must presently be 8570 compliant (IAT Level 2 preferred) * Bachelor of Arts/Bachelor of Science in a field applicable to this work * US Citizenship Required * TS/SCI with CI Poly Desired Qualifications * Linux OS (CentOS, RHEL) administration. * Satellite server administration. * Ansible playbook writing. * Implementing STIGs. * Experience supporting a software configuration management and development environment ## Description The job duties of the Sr. Systems Administrator are as follows: * Plans, designs, and implements infrastructure changes and system upgrades. * Manages and troubleshoots multiple VMware environments. * Provides Windows Server and Linux administration, maintenance, and troubleshooting. * Creates STIG compliant images for Windows Desktop, Windows Server, and Linux OS. * Creates, tests, and deploys software packages using software deployment products such as SCCM, PDQ, etc. * Provides expert level support and mentoring for Mid and Junior Systems Administrator personnel. * Develops and maintains installation and configuration procedures for system and software changes. * Utilizes scripting to automate common tasks. * Performs hardware maintenance/repair activities. * Ensures proper planning and execution of major projects/maintenance activities. * Provides advanced level administration and troubleshooting of Active Directory, GPO, DNS, DHCP, and Domain Controllers. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) ## Related Articles - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [A Guide to Green Tech and Green IT Careers](https://www.wearedevelopers.com/magazine/374-a-guide-to-green-tech-and-green-it-careers) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer)