Linux System Administrator (Active TS/SCI Clearance with Full Scope Polygraph Required)

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

Benefits offered by this job

Health, Dental, Vision Insurance

401(k) with company match

PTO & Paid Holidays

Tuition Reimbursement

Job summary

J&T Business Consulting is seeking a Linux System Administrator at the senior level with an Active TS/SCI clearance and polygraph requirement. The role is based in Annapolis Junction, MD, supporting enterprise Linux/Windows environments and tiered IT operations.

Responsibilities include configuring and patching Linux/Windows systems, performing upgrades, and ensuring STE compliance. Candidates should have 10+ years of systems administration experience with strong CentOS/RHEL/ Rocky Linux skills

Qualifications

• Bachelor’s degree in a technical discipline plus 10+ years of Systems Administration experience on similar scope, or 15 years without a degree.
• Strong hands‑on Linux administration across CentOS 7, Rocky Linux 9, and RHEL 9.

Responsibilities

• Configure, manage, patch, and maintain enterprise Linux and Windows operating systems.
• Provide Tier 1 and Tier 2 troubleshooting, incident diagnosis, and resolution for client/server/storage/network components.
• Execute hardware and software installations, system upgrades, and migrations for servers and workstations.
• Support Secure the Enterprise (STE) requirements and customer data transfer processes.
• Optimize system operations and perform capacity planning and performance analysis.
• Manage ticket escalations and provide technical feedback to stakeholders.
• Configure and maintain network components and OS security enhancements.

Skills

Linux admin

CentOS 7

Rocky Linux 9

RHEL 9

Ansible

Proxmox

TLS certificates

IDM

Windows admin

Education

Bachelor’s degree in a technical discipline

15 years of relevant Systems Admin experience without a degree

Tools

Proxmox

Ansible

Job description

Linux System Administrator (Active TS/SCI Clearance with Full Scope Polygraph Required)

Annapolis, United States | Posted on 10/16/2026

Location: Annapolis Junction, MD

Employment Type: Full-Time

Clearance Requirement: Active TS/SCI with Polygraph

Salary Range: $118,000 – $142,000 / year (dependent on experience, education, and skill set)

About the Role

Seeking an experienced Linux System Administrator (Level 2) to provide comprehensive systems administration, operations, troubleshooting, and infrastructure support in Annapolis Junction, MD.

In this role, you will manage day-to-day operations and configurations across enterprise client, server, storage, network, and mobile systems. You will handle Tier 1 and Tier 2 escalations, execute server and workstation upgrades, perform physical hardware installations, optimize resource utilization, and maintain UNIX/Linux and Windows operating environments to maximize system reliability and performance.

Key Responsibilities

• Configure, manage, patch, and maintain enterprise Linux (CentOS 7, Rocky 9, RHEL 9) and Windows operating systems.
• Provide Tier 1 and Tier 2 troubleshooting, incident diagnosis, and issue resolution for client, server, storage, and network components.
• Execute hardware and software installations, system upgrades, and migrations for servers, workstations, and laptops.
• Support Secure the Enterprise (STE) requirements and customer‑specific secure data transfer processes.
• Optimize system operations and resource allocation; perform ongoing system capacity planning and performance analysis.
• Manage ticket escalations, provide detailed technical feedback to stakeholders, and track hardware dispatch resolution workflows.
• Configure and maintain the integrity of network components and implement operating system enhancements.

Required Qualifications & Experience

• Security Clearance: Active TS/SCI with a current Polygraph.
• Experience & Education: Bachelor’s degree in a technical discipline from an accredited institution plus at least 10 years of Systems Administration experience on programs/contracts of similar scope and complexity, OR
• 15 years of relevant Systems Administration experience without a degree (5 additional years substituting for the degree).
• Linux Administration: Strong hands‑on experience administering CentOS 7, Rocky Linux 9, and Red Hat Enterprise Linux (RHEL 9).
• Hardware & Operations: Proven experience handling physical server/workstation installations, system refreshes, and hardware troubleshooting.
• Customer Processes: Demonstrated familiarity with Secure the Enterprise (STE) tasks and authorized data transfer workflows.

Desired Qualifications

• Red Hat Certified System Administrator (RHCSA) certification.
• Infrastructure task automation experience using Ansible.
• Experience with PXE network booting and provisioning virtual machines using Proxmox.
• Working knowledge of Identity Management (IDM) systems and IDM integration with CentOS LDAP servers.
• Hands‑on experience troubleshooting and configuring Transport Layer Security (TLS) certificates.
• Experience with Windows 10/11 administration and advanced Linux networking concepts.

Benefits & Compensation

This position offers a comprehensive benefits package designed to support employees both personally and professionally:

• Comprehensive Health, Dental, and Vision Insurance
• Basic Life and Disability Insurance
• Paid Time Off (PTO) and Paid Holidays
• 401(k) Retirement Plan with Company Match
• Tuition Reimbursement for ongoing education and professional development

An Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected under federal, state, or local law.