Principal System Administrator, ATIC TEDNET, Tucson AZ Onsite

Position Summary : Principal Systems Administrator for Raytheon Digital Technology Solutions Design & Integration – Advanced Technology & Integration Center (SDI-ATIC), located in Tucson, AZ. 100% onsite. Requires U.S. citizenship and the ability to obtain and maintain a U.S. government‑issued Secret security clearance. Responsibilities Provide systems administration in a heterogeneous Microsoft Windows and Red Hat Enterprise Linux environment. Administer and maintain Windows Server internals and/or Linux fundamentals, including DNS, DHCP, Active Directory (AD), and server replication methods. Manage VMware vCenter, vSphere, ESX, and other virtual computing methods. Troubleshoot technical issues of moderate to high complexity, including hardware and operating system integration. Install, configure, update, and manage system hardware, storage, and backups for servers, workstations, and network devices. Document hardware and software configurations, procedures, and other necessary artifacts. Provision and configure new systems for internal customers, ensuring alignment with defined requirements. Perform rack‑and‑stack activities and manage hardware inventory for accuracy. Understand data RAID, backup technologies, and perform related tasks. Install and configure software applications requested by end users. Obtain Department of Defense Directive (DoDD) 8140 / 8570 certification (CompTIA Security+ CE or equivalent) within six months of start date. Qualifications Bachelor’s degree in a related field and five years of relevant experience, or a master’s degree and three years of relevant experience. Must obtain and maintain a U.S. government‑issued Secret security clearance. Experience in automation and scripting for system deployment (e.g., PowerShell, Python, Bash). Experience in Windows or Red Hat client‑server environments, including server replication and configuration. Hands‑on experience managing and using VMware vCenter, vSphere, VDI (Horizon), ESX, or other virtual computing methods. Proficiency in Windows or Linux systems administration. Experience with Active Directory, VMware, MySQL, and networking administration. Preferred: Containerization technologies such as OpenShift, Kubernetes, Docker, Tanzu, and Rancher. Preferred: Continuous Integration/Continuous Delivery tools such as GitLab, Jenkins, and Azure DevOps. Preferred: Knowledge of NISPOM, JAFAN, JSIG, DFARS, and/or DoD/RMF data storage, NAS, and SAN technologies. Preferred: High‑Performance Computing (HPC) experience in a Linux environment. Strong scripting experience. Benefits Healthcare (medical, dental, vision), life insurance, short‑term and long‑term disability, 401(k) match, paid time off, holidays, and other standard benefits in accordance with company policy. RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. #J-18808-Ljbffr