TS/SCI System Administrator – Secure IT & NetOps

Cornerstone Defense LLC; Annapolis (MD); On-site; USD 105,000 - 125,000; Full time

Benefits offered by this job

Medical, Dental and Vision Plans

401(k)

Job summary

Cornerstone Defense LLC is seeking a System Administrator in Annapolis Junction, MD, offering a compensation range of $105,000 to $125,000 and requiring Active TS/SCI with Polygraph to apply. The role focuses on supporting IT systems, monitoring, and incident resolution across client/server/storage/network devices.

The candidate will manage UNIX and Windows environments, implement security tooling, and ensure reliable, high-performance IT operations for defense programs.

Qualifications

• Bachelor's degree in Computer Science or related discipline is required.
• Five (5) years of additional SA experience may be substituted for a bachelor's degree.
• Five (5) years’ experience as a SA in programs and contracts of similar scope, type, and complexity is required.

Responsibilities

• Provide support for implementation, troubleshooting and maintenance of IT systems.
• Manages IT system infrastructure and related processes.
• Provides Tier 1 and Tier 2 support, including escalation and status communication to management.
• Configures UNIX and Windows OS and installs loads, troubleshoots, maintains integrity, and configures network components.

Skills

Windows administration

UNIX administration

System security tools

Education

Bachelor's degree in Computer Science or related discipline

Five years of additional SA experience may substitute for a bachelor's degree

Tools

ELK

Tripwire

VMware

RedHat SELinux

Job description

Cornerstone Defense LLC is seeking a System Administrator in Annapolis Junction, MD, offering a compensation range of $105,000 to $125,000 and requiring Active TS/SCI with Polygraph to apply. The role focuses on supporting IT systems, monitoring, and incident resolution across client/server/storage/network devices.

The candidate will manage UNIX and Windows environments, implement security tooling, and ensure reliable, high-performance IT operations for defense programs.