Classified Systems Administrator

STR · Atlanta, GA · Operations

Posted 2026-08-11

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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)

The base salary range for this role is $85,000.00 - $120,000.00

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