# Classified Systems Administrator at STR > United States · Unspecified · Software engineering · open. Source: https://alderhq.app/jobs/greenhouse%3Asystemstechnologyresearch%3A4714326006 (read 2026-11-05). ## Facts (observed) - Company: [STR](https://alderhq.app/companies/str) - Location text: Arlington, VA; Arlington - Where it can be done from (inferred): United States (evidence: "Location: Arlington, VA; Arlington") - Posted: 2026-09-18 (48 days ago) - First seen by alder: 2026-11-02 · last verified: 2026-11-04 - Reposted: 0 times · edited: 0 times - Apply on the employer's site: https://job-boards.greenhouse.io/systemstechnologyresearch/jobs/4714326006 ## Pay and sponsorship - Posted pay: $105k–$125k per year (from the description) - Market band for similar posted roles (Washington DC, n 204): p25 $119k, median $138k, p75 $165k ## Description (the employer's text) STR is hiring a Systems Administrator with an Top Secret/SCI with polygraph clearance. Help power the infrastructure behind cutting-edge defense research. At STR, our Information Technology team plays a critical role in enabling the research and development that supports our national security mission. The team brings together experts across Enterprise IT, Classified IT, and Cybersecurity to build and maintain the secure, reliable infrastructure that powers our organization. Our Enterprise IT team ensures the performance and availability of the systems that support day-to-day operations, while our Classified IT team manages highly secure environments that protect sensitive government information. Working alongside them, our Cybersecurity team proactively defends our networks and systems against evolving threats. Together, these teams provide the technology foundation that enables STR’s engineers and researchers to develop innovative solutions for national defense. ### The Role We are seeking a Systems Administrator with an active Secret or Top Secret clearance to support our senior administrators in implementing, deploying, and maintaining Linux (Red Hat, Ubuntu) and Windows operating systems in traditional and virtualized environments across a variety of hardware solutions. If you enjoy solving complex infrastructure challenges, improving system reliability, and working in a mission-driven environment, we’d love to hear from you. Please note: this position is based in Arlington, VA only (no other sites, no remote). ### What you will Do - Professionally support senior administrators, Information System Security Officers (ISSO), management, researchers and others supporting the customers - Configure and maintain NAS Storage, Networking, Firewall, and Directory Services such as MS Active Directory management and Group Policy administration - Perform performance monitoring, results analysis and enhancement, as well as process automation using PowerShell scripting and other available technologies - Provide daily support, systems maintenance, problem resolution, tracing and project support - Create and maintain installation and configuration Standard Operating Procedures (SOPs) - Maintain current knowledge of DoD security and technical guidelines and the organization's policies - Provide support for production and development environments - After-hours support is required for maintenance and patching when needed ### Who you Are - This position requires an active Top Secret/SCI with polygraph clearance, for which U.S. citizenship is needed by U.S. Government - Linux Administration (Red Hat, Ubuntu) - Windows OS Administration ### Nice to Haves - Enterprise Virtualization Tools - Multi-Factor Authentication - Public Key Infrastructure - Web Server - Active Directory including Group Policy, LDAP backend, and Replication - Effective utilization of Security Technical Implementation Guidelines (STIGS) and Security Content Automation Protocol (SCAP) Content and Tools - Host Based Security System (HBSS) implementation and maintenance - Assured Compliance Assessment Solution (ACAS) support - Current knowledge of DoD Ports, Protocols, and Services (PPS) ### Education Bachelor’s degree + 5 years of experience or Master’s degree + 3 years of experience or PhD or equivalent experience. Pay Information Full-Time Salary Range: $105,000 to $125,000 The salary range listed is based on external market data. Offers are based on factors, such as but not limited to, the candidate’s experience, education, training, key skills/critical skills, security clearances, and prevailing market and business conditions. STR is a growing technology company with locations near Boston, MA, Arlington, VA, near Dayton, OH, Melbourne, FL, Carlsbad, CA, Atlanta, GA, and Denver, CO. We specialize in advanced research and development for defense, intelligence, and national security in: cyber; next generation sensors, radar, sonar, communications, and electronic warfare; and artificial intelligence algorithms and analytics to make sense of the complexity that is exploding around us. --- Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/greenhouse%3Asystemstechnologyresearch%3A4714326006 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.