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

Job summary

J&T Business Consulting in Annapolis Junction, MD is seeking an experienced Linux System Administrator (Level 2) with active TS/SCI clearance and polygraph to support enterprise clients. You will manage day-to-day operations across Linux and Windows environments, perform upgrades, and troubleshoot incidents.

This role requires strong hands-on experience with CentOS 7, Rocky 9, and RHEL 9, hardware installations, STE processes, and effective communication with stakeholders.

Qualifications

• Bachelor’s degree in a technical discipline plus 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 (additional years substituting for the degree).
• Linux administration including CentOS 7, Rocky Linux 9, and Red Hat Enterprise Linux 9.
• Experience with hardware installations, system refreshes, and STE secure data transfer workflows.

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 for client, server, storage, and network components.
• Execute hardware and software installations, system upgrades, and migrations for servers and workstations.
• Support STE requirements and customer-specific secure data transfer processes.
• Optimize system operations and resource allocation; perform capacity planning and performance analysis.
• Manage ticket escalations and communicate technical feedback to stakeholders.

Skills

Linux Administration

Windows Administration

Troubleshooting

Server Management

Education

Bachelor's degree in a technical discipline

15 years of relevant Systems Administration experience without a degree

Tools

Ansible

Proxmox

PXE booting

IDM

TLS certificates

VLAN/Networking

Job description

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

Annapolis, United States | Posted on 10/28/2026

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.