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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Principal System Administrator - **Company:** RTX - **Location:** Independence, TX, United States - **Experience:** Expert - **Salary:** $107,500.0 - $204,500.0 - **Contract:** Permanent contract - **Skills:** Bash Shell, CompTIA Security+, Cyber Security, Computer Programming, Linux, Hardware Design, Information Technology Operations, Python (Programming Language), OpenShift, Performance Tuning, Windows PowerShell, Red Hat Enterprise Linux, Ansible, Scripting, Tanzu, Kubernetes, Infrastructure Automation Frameworks, Information Technology, National Industrial Security Program Operating Manual (NISPOM), Terraform, Docker, Vmware - **Published:** August 20, 2026 - **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-TX-PLANO-465--465-Independence-Pkwy--INDEPENDENCE/Sr-Principal-System-Administrator_01867107 ## 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 2 years of prior relevant experience, or an Advanced Degree in a related field. * Active and transferrable final U.S. government issued Top Secret security clearance is required prior to start date with the ability to obtain program access after start. US citizenship is required, as only U.S. citizens are eligible for a security clearance.". **Specific Customer Clearance required before a start date will be established** * Experience administering Red Hat Enterprise Linux environments. * Experience mentoring both individuals and teams., * An active DoD TS Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification). * Experience with any of the following technologies: VMware, OpenShift, Kubernetes, Docker, Tanzu, Podman, Infrastructure as Code (Terraform and/or Ansible), Windows administration. * Scripting/coding proficiency (Python/Go/PowerShell/Bash). * Experience supporting engineers in software, simulations, and hardware development. * Experience working with NISPOM, JAFAN, JSIG, and/or DoD/RMF guidelines. ## Description Sr. Principal Linux Systems Administrator, in Infrastructure Workplace Services, will lead and collaborate with a diverse team to support fast-paced, critical programs with classified information system capabilities. Success in this role means you can develop, implement and maintain secure, cost-efficient environments across various classified programs. Program teams rely on your collaboration and guidance to define computing requirements and create end-to-end solutions to solve complex IT infrastructure problems. What You Will Do: * Manage and optimize Red Hat Enterprise Linux infrastructure, ensuring reliable and secure IT operations. * Act as a senior technical resource for the team to maintain confidentiality, integrity, and availability of assigned IT systems and applications. * Partner with Cybersecurity teams to maintain compliance with security requirements and provide documentation, training, and guidance on advanced IT processes and procedures. * Mentor and guide junior administrators across a broad range of responsibilities, including corrective and preventive maintenance, routine operational tasks, account management, and system performance tuning. * Lead and contribute to technical meetings with internal teams and program stakeholders, providing technical guidance and best practice to ensure successful outcomes. * Develop, document, and enforce system administration processes, standards, and best practices. * Participate in Change Request reviews and serve on Change Management Boards at various program levels. * Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification). * Systems are operational 24x7 and occasionally require work effort beyond standard work hours. * Travel required up to 5% * Full time 100% Onsite position ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [The Private AI Platform: Why Agentic Apps Need a Private Application Platform](https://www.wearedevelopers.com/videos/100162-the-private-ai-platform-why-agentic-apps-need-a-private-application-platform) - [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) ## 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) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)