Senior Linux Systems Administrator – TS/SCI Poly (On‑Site)

J&T Business Consulting; Annapolis (MD); On-site; USD 118,000 - 142,000; Full time

Benefits offered by this job

Health insurance

Life and disability insurance

Paid time off

401(k) retirement plan

Tuition reimbursement

Job summary

J&T Business Consulting seeks an experienced Linux System Administrator (Level 2) with active TS/SCI clearance and full polygraph to support enterprise systems in Annapolis Junction, MD. You will manage Linux and Windows environments, handle escalations, upgrades, and performance optimization.

Responsibilities include configuring consistent security and access controls, coordinating hardware installations, and ensuring STE compliance.

Qualifications

• Bachelor’s degree in a technical discipline plus at least 10 years of Systems Administration experience on contracts of similar scope.
• Alternatively, 15 years of relevant Systems Administration experience without a degree.
• Hands-on administration of CentOS 7, Rocky Linux 9, and RHEL 9.

Responsibilities

• Configure, manage, patch, and maintain Linux and Windows operating systems across enterprise environments.
• Provide Tier 1 and Tier 2 troubleshooting, incident diagnosis, and resolution.
• Perform hardware/software installations, upgrades, and migrations for servers and workstations.
• Support STE requirements and secure data transfer workflows.
• Optimize resources, perform capacity planning, and analyze performance.
• Manage ticket escalations, provide technical feedback, and coordinate hardware dispatch.

Skills

Linux administration

CentOS 7

Rocky Linux 9

RHEL 9

Troubleshooting

Server/hardware

Windows admin

Tier 1/2 support

Education

Bachelor’s degree in a technical discipline

10 years Systems Administration experience

15 years Systems Administration without a degree

Tools

Proxmox

Ansible

PXE booting

Job description

J&T Business Consulting seeks an experienced Linux System Administrator (Level 2) with active TS/SCI clearance and full polygraph to support enterprise systems in Annapolis Junction, MD. You will manage Linux and Windows environments, handle escalations, upgrades, and performance optimization.

Responsibilities include configuring consistent security and access controls, coordinating hardware installations, and ensuring STE compliance.