Classified Systems Administrator

About the role

STR’s Information Technology team enables cutting‑edge defense research by building and maintaining secure, reliable infrastructure. The Enterprise IT team ensures performance and availability for day‑to‑day operations, the Classified IT team protects highly sensitive government information, and the Cybersecurity team defends networks against evolving threats. This Systems Administrator position supports senior administrators in implementing, deploying, and maintaining Linux (Red Hat, Ubuntu) and Windows operating systems in both traditional and virtualized environments. The role is based in Arlington, VA (no remote work).

Responsibilities

• Professionally support senior administrators, Information System Security Officers (ISSO), management, researchers, and other customers.
• Configure and maintain NAS storage, networking, firewalls, and directory services such as Microsoft Active Directory and Group Policy.
• Perform performance monitoring, results analysis, and enhancement; automate processes using PowerShell and other technologies.
• Provide daily support, systems maintenance, problem resolution, tracing, and project assistance.
• Create and maintain installation and configuration Standard Operating Procedures (SOPs).
• Maintain current knowledge of DoD security and technical guidelines and the organization’s policies.
• Support production and development environments.
• Provide after‑hours support for maintenance and patching when needed.

Requirements

• Active Top Secret/SCI clearance with polygraph (U.S. citizenship required).
• Linux Administration experience (Red Hat, Ubuntu).
• Windows OS Administration experience.

Qualifications

• Bachelor’s degree + 5 years of relevant experience, or
• Master’s degree + 3 years of relevant experience, or
• PhD or equivalent experience.

Skills

• Enterprise virtualization tools (nice to have).
• Multi‑Factor Authentication (nice to have).
• Public Key Infrastructure (nice to have).
• Web server administration (nice to have).
• Active Directory, including Group Policy, LDAP backend, and replication (nice to have).
• Effective utilization of Security Technical Implementation Guidelines (STIGs) and Security Content Automation Protocol (SCAP) content and tools (nice to have).
• Host‑Based Security System (HBSS) implementation and maintenance (nice to have).
• Assured Compliance Assessment Solution (ACAS) support (nice to have).
• Current knowledge of DoD Ports, Protocols, and Services (PPS) (nice to have).

Pay

Full‑Time Salary Range: $105,000 to $125,000. The range is based on external market data; offers consider experience, education, training, key/critical skills, security clearances, and prevailing market and business conditions.