> Markdown version of [/jobs/ext/3420599-sr-principal-linux-systems-administrator](https://www.wearedevelopers.com/jobs/ext/3420599-sr-principal-linux-systems-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). --- # Sr. Principal Linux Systems Administrator - **Company:** RTX - **Location:** Andover, MA, United States - **Experience:** Expert - **Salary:** $107,500.0 - $204,500.0 - **Contract:** 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, Kubernetes, Infrastructure Automation Frameworks, Information Technology, National Industrial Security Program Operating Manual (NISPOM), Terraform, Docker, Vmware - **Published:** September 13, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=6a578f66ca7c9fc8 ## About the Role Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date, * Typically requires a bachelor's degree or equivalent experience and minimum 8 years prior relevant experience, or an Advanced Degree in a related field and minimum 5 years' experience. * Advanced experience administering Red Hat Enterprise Linux environments * Experience mentoring both individuals and teams. * Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent) within a reasonable amount of time. * Ability to obtain INTERIM 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., * Experience with any of the following technologies: VMware, Kubernetes, OpenShift, 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. * Strong communication skills, with ability to influence and drive change with peers and leaders across the organization. ## 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. This role requires on-site presence in Andover, MA. Relocation may be available if the selected applicant meets company policy criteria. 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. * Systems are operational 24x7 and occasionally require work effort beyond standard work hours. * Travel to other US Domestic locations may be required as business needs dictate. 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