Linux Systems Administrator (TS/SCI w/ Poly) – On-Call Role

J&T Business Consulting; New York (NY); On-site; USD 111,000 - 135,000; Full time

Benefits offered by this job

Health insurance

401(k) plan with company matching

Paid time off

Job summary

J&T Business Consulting in Columbia, United States, is seeking a Systems Administrator 1 with TS/SCI Clearance and Polygraph to support mission-critical Linux environments. You will perform hands-on administration, monitor data and messaging flows, and rapidly resolve issues to uphold system uptime.

The role includes 6:00 AM–6:00 PM coverage on business days, a 24/7 on-call rotation every 5–6 weeks, and shift differential with on-call compensation.

Qualifications

• The active TS/SCI with Polygraph clearance is required.
• Minimum of five (5) years of direct Linux systems administration experience (no degree required).
• Solid command-line proficiency with Linux OS environments, troubleshooting utilities, and shell navigation.

Responsibilities

• Linux Administration: Perform daily operating system management, maintenance, user administration, and system health checks using command-line tools.
• Data & Message Flows: Monitor, manage, and verify application, data, and messaging pipeline performance across core systems.
• Troubleshooting & Issue Resolution: Investigate, diagnose, and resolve technical hardware, software, and operational bottlenecks.
• System Availability: Ensure mission system uptime by adhering to operational procedures and responding promptly to system alerts and downtime incidents.
• Documentation & Coordination: Document system modifications, track recurring issues, and collaborate with engineering peers during handoffs and scheduled maintenance windows.

Skills

Linux

Command-line

Shell scripting

Job description

J&T Business Consulting in Columbia, United States, is seeking a Systems Administrator 1 with TS/SCI Clearance and Polygraph to support mission-critical Linux environments. You will perform hands-on administration, monitor data and messaging flows, and rapidly resolve issues to uphold system uptime.

The role includes 6:00 AM–6:00 PM coverage on business days, a 24/7 on-call rotation every 5–6 weeks, and shift differential with on-call compensation.