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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal System Administrator (Linux) (Onsite) - **Company:** RTX - **Location:** Marlborough, MA, United States - **Experience:** Experienced - **Salary:** $86,800.0 - $165,200.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Software Applications, Backup Devices, CompTIA Security+, Cyber Security, Dynamic Host Configuration Protocol, Linux, Disaster Recovery, RAID, Domain Name System (DNS), VMware ESX Servers, Hardware Design, Systems Analysis, Linux System Administration, Linux Servers, System Center Configuration Manager, Windows Servers, MySQL, Red Hat Enterprise Linux, Remote Desktop Services, VMware VSphere, Scripting, Data Storage Technologies, High Performance Computing, Virtual Computing, Information Technology, Vcenter, National Industrial Security Program Operating Manual (NISPOM), Veeam, Splunk, Wsus, Vmware - **Published:** July 8, 2026 - **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-MA-MARLBOROUGH-MA4--1001-Boston-Post-Rd--BLDG-4/Principal-System-Administrator--Linux---Onsite-_01857998 ## About the Role The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance, * Typically requires a University Degree and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience * Minimum 5 years of direct hands-on Linux administration experience and systems analysis / administration / networking experience with combinations of technologies such as: Active Directory, WSUS, VMware, Veeam, MySQL, Remote Desktop Gateway, Splunk, Windows and Linux administration; experience with backup, recovery, and disaster recovery. * Experience supporting Linux Server architectures to include troubleshooting solutions and documentation of technical problems / actions. * 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. * The ability to obtain and maintain a U.S. government DoD Secret security clearance is required . * U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance., * An active DoD TS/SCI with Polygraph clearance or prior SCI/program eligibility * Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification * Direct working experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF * In-depth working experience in Windows Server * Experience with data storage, NAS, and SAN technologies and solutions * Experience with using Information Technology project lifecycle management processes * Experience using VMWare vCenter, vSphere, and ESX and/or other virtual computing methods * 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 Experience ## Description * Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux environment supporting Windows Server internals and/or Linux fundamentals to include DNS, DHCP, AD, and server replication methods. * Working 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). * Using data RAID and data backup technologies; installation an configuration of software applications; work with Cybersecurity professionals to maintain security requirements and provide documentation and training on advanced IT processes and procedures. ## Related Videos - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Coding for Good: Achieving social change with an app](https://www.wearedevelopers.com/videos/1645-coding-for-good-achieving-social-change-with-an-app) - [The Developer Workstation Blind Spot: Why Your Security Stack Can't See What Matters Most](https://www.wearedevelopers.com/videos/100254-the-developer-workstation-blind-spot-why-your-security-stack-can-t-see-what-matters-most) - [Branch your database like your code: How schema changes and pull requests go hand in hand](https://www.wearedevelopers.com/videos/350-branch-your-database-like-your-code-how-schema-changes-and-pull-requests-go-hand-in-hand) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-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) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries)