Find jobs
Pricing
Free Resume Checker
Blog
Sign in
Sign up
FIND JOBSPRICINGFREE RESUME CHECKERBLOGSIGN INSIGN UP
Jobs
/Systems Administrator jobs
STR

Classified Systems Administrator

Salary$85k – $120k
LocationAtlanta, GA
Work modeon-site
Typefull-time
SeniorityMid
DepartmentInformation Technology
Company size1,001–5,000 people
First seenOct 4, 2026 · 1w ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
Must have6
Active Top Secret/SCI security clearance, U.S. citizenship needed
Understanding of the basics of Linux (Red Hat, CentOS, Ubuntu) and Windows OS Administration
Experience with business and engineering applications (e.g. Microsoft Office, MATLAB, Visual Studio, VMWare)
Excellent problem solving, time management and organizational skills
Exceptional customer service, interpersonal skills, and desire to learn
Self-motivated with strong analytical, diagnostic, and troubleshooting skills
Nice to have8
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 STIGS and SCAP Content and Tools
Host Based Security System (HBSS) implementation and maintenance
Current knowledge of DoD Ports, Protocols, and Services (PPS)
Skills
Linux
Red Hat
CentOS
Ubuntu
Windows
VMWare
Microsoft Office
MATLAB
Visual Studio
PowerShell
Active Directory
Group Policy
LDAP
NAS Storage
Networking
Firewall
HBSS
STIGS
SCAP
PKI
Multi-Factor Authentication
About the role
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
Legal
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.
About the company
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 [email protected] 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.
More roles at STR
Lead Algorithm Solutions EngineerPrincipal Software EngineerPrincipal Software EngineerLead Digital Hardware EngineerSoftware Reverse Engineer
Seekless
Seek less: one search across companies' own career pages, instead of a dozen job boards.
Product
Find jobsCompaniesPricingFree Resume Checker
Company
AboutBlog
Legal
PrivacyTermsCookies
© 2026 SEEKLESS. ALL RIGHTS RESERVED.BUILT WITH CARE