Classified Systems Administrator
Systemstechnologyresearch
$85,000 - $120,000 / year
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Description
STR is hiring a Systems Administrator with an active Top-Secret clearance to support our Atlanta, GA
Responsibilities:
- Supporting senior administrators in implementing, deploying, and maintaining Linux (Red Hat, CentOS, Ubuntu) and Windows operating systems in traditional and virtualized environments across a variety of hardware solutions
- Supporting Information Systems Security Managers (ISSM), Information System Security Officers (ISSO), senior management, researchers and other team members supporting the customers’ requirements
- Running vulnerability and compliance scanning tools and have the knowledge to remediate the findings
- Performing monthly patching of offline Windows and Linux assets
- Researching and procuring necessary hardware and software components required to complete a task
- Maintaining an accurate inventory of hardware and software licenses.
- Performing hands-on diagnostics at the desktop level, including installing and upgrading software, implementing file backups, and configuring systems and applications.
- Creating and/or maintaining end-user documentation for operating procedures
- Configuring and maintaining NAS Storage, Networking, Firewall, and Directory Services such as MS Active Directory management and Group Policy administration
- Performing performance monitoring, results analysis and enhancement, as well as process automation using PowerShell scripting and other available technologies
- Providing daily lab support, systems maintenance, problem resolution, tracing and project support
- Creating and maintaining installation and configuration Standard Operating Procedures (SOPs)
- Maintaining current knowledge of DoD security, technical guidelines and organizational policies
- Providing support for production and development environments
- Assisting with requests in the ticketing system for Desktop Support Services including scanners, copies, printers, phones and phone services
- Providing ad-hoc travel and after-hours support for our Information Systems’ maintenance, patching and remediation
Requirements:
- This position requires an active Top Secret /SCI security clearance, for which U.S. citizenship is needed by U.S. Government
- Understanding of the basics of Linux (Red Hat, CentOS, Ubuntu) and Windows OS Administration
- Experience with business and engineering applications (ex. Microsoft Office, MATLAB, Visual Studio, VMWare and other scientific/engineering applications)
- Excellent problem solving, time management and organizational skills with the ability to prioritize work and meet customer demands and deadlines
- Exceptional customer service, interpersonal skills, and desire to learn.
- Self-motivated with strong analytical, diagnostic, and troubleshooting skills
Preferred:
- Microsoft and/or Linux technical certifications
- Active Directory including Group Policy, LDAP backend, and Replication
- Enterprise Virtualization Tools
- Multi-Factor Authentication and Public Key Infrastructure
- Web Server management
- 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
- Current knowledge of DoD Ports, Protocols, and Services (PPS)
Pay Information
Full-Time Salary Range: $85,000 to $120,000
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.
STR is committed to creating a collaborative learning environment that supports deep technical understanding and recognizes the contributions and achievements of all team members. Our work is challenging, and we go home at night knowing that we pushed the envelope of technology and made the world safer.
STR is not just any company. Our people, culture, and attitude along with their unique set of skills, experiences, and perspectives put us on a trajectory to change the world. We can't do it alone, though - we need fellow trailblazers. If you are one, join our team and help to keep our society safe! Visit us at www.str.us for more info.
STR is an equal opportunity employer. We are fully dedicated to hiring the most qualified candidate regardless of race, color, religion, sex (including gender identity, sexual orientation and pregnancy), marital status, national origin, age, veteran status, disability, genetic information or any other characteristic protected by federal, state or local laws.
If you need a reasonable accommodation for any portion of the employment process, email us at appassist@str.us and provide your contact info.
Pursuant to applicable federal law and regulations, positions at STR require employees to obtain national security clearances and satisfy the requirements for compliance with export control and other applicable laws.
About this role
Supporting classified defense and intelligence systems at STR requires hands-on expertise across Linux and Windows infrastructure, from deployment and patching to vulnerability remediation and compliance scanning. You'd work alongside senior administrators and security officers to maintain both production and development environments, handling everything from Active Directory and virtualization to NAS storage configuration and PowerShell automation. The role demands someone comfortable with DoD security frameworks, technical guidelines, and the ability to troubleshoot at the desktop level while also thinking strategically about system architecture and process documentation.
This position is based in Atlanta and requires an active Top Secret/SCI clearance—a prerequisite you must already hold or be eligible to obtain as a U.S. citizen. Beyond core Linux and Windows administration skills, the ideal candidate brings experience with business and engineering applications, strong problem-solving abilities, and genuine customer service instincts. Certifications in Microsoft or Linux administration, Active Directory expertise, and familiarity with security tools like STIGS and SCAP are valued, though not all are required to start.
The role includes on-call support and occasional travel for systems maintenance and remediation work. STR offers a salary range of $85,000 to $120,000 for this full-time, in-office position, with the opportunity to contribute to national security work across defense, intelligence, and advanced research initiatives.
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Pay for this role
$85,000 to $120,000 per year
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