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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, SC Clearance, Kubernetes, Infrastructure Automation Frameworks, Information Technology, National Industrial Security Program Operating Manual (NISPOM), Terraform, Docker, Vmware - **Published:** July 16, 2026 - **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-MA-ANDOVER-AN1--350-Lowell-St--AN1-ESSEX-BLDG/Sr-Principal-Linux-Systems-Administrator_01860108 ## 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, 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. Up to 10% per year., * Please ensure the role type defined below is appropriate for your needs before applying to this role. This position is classified as: Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products. * This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [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) - [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) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)