> Markdown version of [/jobs/ext/520542-tier-3-system-administrator-ts-sci-with-polygraph](https://www.wearedevelopers.com/jobs/ext/520542-tier-3-system-administrator-ts-sci-with-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). --- # Tier 3 System Administrator - TS/SCI with Polygraph - **Company:** General Dynamics Information Technology - **Location:** Aurora, CO, United States - **Experience:** Expert - **Salary:** $110,500.0 - $149,500.0 - **Contract:** Permanent contract - **Skills:** Microsoft Word, Java (Programming Language), Microsoft Excel, Microsoft Windows, Active Directory, Microsoft Outlook, CompTIA Security+, Dynamic Host Configuration Protocol, Linux, Distributed File Systems, Domain Name System (DNS), Microsoft Exchange Server, Web Browsers, Lightweight Directory Access Protocols (LDAP), System Center Configuration Manager, Windows Servers, Citrix Systems, Windows PowerShell, Virtualization Technology, Software Troubleshooting, Information Technology, 3-tier Architectures, Cisco, Servicenow, Vmware - **Published:** June 5, 2026 - **Apply:** https://dejobs.org/x/x/70BB8D25CB2548DC831D880778AC5167/job/ ## About the Role Linux,Microsoft Windows,System Administration Experience: 5 + years of related experience, * Bachelor's Degree in Computer Science, Engineering or a related technical discipline, or the equivalent combination of education, technical training, or work/military experience. * 5+ years of related systems administration experience * TS/SCI with Polygraph is required. * 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 and knowledge/understanding of: * Active Directory Administration * DNS, DHCP, DFS, LDAP * Windows 10, Server 2012, Server 2016, * Application Troubleshooting such as Outlook, Excel, Word, JAVA, Internet Explorer * Linux Operating system * Understanding of ServiceNow, NETS or other ticketing process * ITIL v3 or higher The following knowledge/skill set is not required but is a plus: * Microsoft System Center Configuration Manager * PowerShell * Virtualization Environments (VMware, Citrix) * Profile management utilizing the VMware User Experience Management (UEM) toolset * Microsoft Exchange * Telephone/Video support * Networking * Familiarity with site specific customer and mission ## Description System Administrative Advisory duties to include management of Windows and Linux workstations on EVDI and physical * Troubleshooting application functionality, crash and performance * Investigate user performance and work with external teams to improve user experience. * Assist customers with Tier 2 incident resolution for Linux and windows applications. * Provide remote end user desktop support. * Identifies, analyzes, and resolves system incidents with both short-term workarounds and long-term solutions. Responds to escalated service desk/team requests. * Communicate effectively (in oral and written form) with a variety of individuals; work well within small and large team environments. * Willingness to provide initial triage, response, and notifications for incidents. * Participates in special projects as required. ## 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) - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [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) ## Related Articles - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know) - [Quick guide: How to write a Software Developer CV](https://www.wearedevelopers.com/magazine/37-quick-guide-how-to-write-a-software-developer-cv)