> Markdown version of [/jobs/ext/3027543-principal-system-administrator](https://www.wearedevelopers.com/jobs/ext/3027543-principal-system-administrator). 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). --- # Principal System Administrator - **Company:** RTX - **Location:** McKinney, TX, United States - **Salary:** $86,800.0 - $165,200.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Backup Devices, Symantec Backup Exec, Bash Shell, CompTIA Security+, Cyber Security, System Configuration, Dynamic Host Configuration Protocol, Desktop Computing, Linux, Domain Name System (DNS), VMware ESX Servers, Hardware Design, Identity and Access Management, Linux System Administration, System Center Configuration Manager, NetBackup, Windows PowerShell, Red Hat Enterprise Linux, Software Tools, VMware VSphere, Scripting, Data Storage Management, Data Storage Technologies, High Performance Computing, Virtual Computing, Vcenter, Hardware Infrastructure, National Industrial Security Program Operating Manual (NISPOM), Splunk, Wsus, Vmware - **Published:** September 22, 2026 - **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-TX-MCKINNEY-513WC--2501-W-University-Dr--WING-C-BLDG/Principal-System-Administrator_01876867 ## About the Role Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance, * Typically requires a University degree or equivalent experience and a minimum of 5 years of prior relevant experience or an Advanced Degree in a related field and minimum 3 years' experience. * Active and transferable U.S. government issued Secret security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance. * Experience with some of, but not limited to, the following technologies: Red Hat Enterprise Linux, Active Directory, WSUS, VMware, BackupExec, NetBackup, prior systems administration experience, Windows or Linux administration, Backup and Recovery enterprise suites., * Experience with Server architectures and troubleshooting methods and ability to assist in developing solutions and documentation to a variety of technical problems. * Experience using VMWare vCenter, vSphere, Linux Desktops, Windows desktops (Windows 10, 11), Splunk and ESX and/or other virtual computing methods. * Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) and an Operating System Certification. * Experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF. * Experience with data storage, NAS, and SAN technologies and solutions. * Experience supporting engineers in software, simulations, and hardware development. * Experience with Microsoft WSUS, SCCM, and/or Exchange. * High Performance Computing (HPC) experience in a Linux environment. * Scripting/ automation PowerShell, Bash experience. ## Description * Provide IT systems administration in a heterogeneous RedHat Enterprise/Microsoft Windows environment. * Lead and coordinate the RedHat Installation and configuration. * Participate in all phases of Engineering software installation and support, with emphasis on testing, documentation, and acceptance phases. * Collaborate with teams and mentor junior Linux admins. * Apply understanding and knowledge of Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server replication methods. * Work as a team member in a fast-paced technological environment. Use troubleshooting techniques to resolve technical problems of a moderate to high scope and complexity to include the integration of hardware and operating systems (OS). * Participate and lead technical meetings with team members and program personnel representing the organization in functional area matters. * Provide documentation and training on advanced IT processes and procedures and other tasks as assigned. * Responsible for provisioning, installation/configuration, operation, and maintenance of systems hardware and software related to a Linux/Windows infrastructure for classified programs. Duties include, but are not limited to, server management (software and hardware); storage management (logical and physical); cross platform authentication and access management; data backup and restoration; software and license configuration; and workstation support. * Work with Cybersecurity professionals to maintain security requirements and provide documentation on advanced IT processes and procedures and other tasks as assigned. * Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within 6 months of start date. * Systems are operational 24x7 and occasionally require work effort beyond standard work hours. * Full time 100% Onsite position. ## 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 - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [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) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing)