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# Senior System Administrator

- **Company:** RTX
- **Location:** Plano, TX, United States
- **Experience:** Expert
- **Salary:** $75,800 - $144,200
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Active Directory, Backup Devices, CompTIA Security+, Cyber Security, System Configuration, Dynamic Host Configuration Protocol, Linux, RAID, Domain Name System (DNS), VMware ESX Servers, Hardware Design, Identity and Access Management, Windows Servers, OpenShift, Red Hat Enterprise Linux, VMware VSphere, Scripting, Data Storage Management, Data Storage Technologies, High Performance Computing, Virtual Computing, Containerization, Tanzu, Kubernetes, Information Technology, Rancher, Vcenter, Hardware Infrastructure, National Industrial Security Program Operating Manual (NISPOM), Wsus, Docker, Vmware
- **Published:** November 10, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9300776/senior-system-administrator

## About the Role

* Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux environment.
 * 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.
 * Apply understanding and knowledge of Windows Server internals 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).
 * Understanding data RAID, data backup uses and technologies.
 * Install and configure software applications requested by end users.
 * Work with Cybersecurity professionals to maintain security requirements and provide documentation and training 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.
 * Must be able to develop solutions and documentation to deal with a variety of technical problems.
 * Systems are operational 24x7 and occasionally require work effort beyond standard work hours.
 * Travel required up to 5%
 * Full time 100% Onsite position

Qualifications You Must Have:

 * 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.
 * The ability to obtain and maintain a U.S. government issued Top Secret security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
 * Must have Windows and/or Linux experience.
 * Experience in one of the following: Active Directory, VMware vCenter, vSphere., * Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification).
 * Active and transferable U.S. government issued top security clearance. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
 * Experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF.
 * In-depth working experience in Windows Server.
 * Experience with Containerization Technologies such as OpenShift, Kubernetes, Docker, Tanzu, and Rancher.
 * 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, SMECP, and/or Exchange.
 * High Performance Computing (HPC) experience in a Linux environment.
 * Scripting Experience.