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

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

Benefits offered by this job

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

401(k) Match

Tuition Reimbursement

PTO and Holidays

Job summary

J&T is seeking an experienced Linux System Administrator (Level 2) in Annapolis Junction, MD to support enterprise IT operations. You will manage Linux and Windows systems, perform escalations, upgrades, and hardware installs, while ensuring STE compliance and secure data transfer workflows.

The role requires an active TS/SCI clearance with polygraph, a technical degree or extensive experience, and strong CentOS/RHEL/ Rocky Linux skills.

Qualifications

• Bachelor’s degree in a technical discipline plus at least 10 years of Systems Administration experience on similar scope programs or contracts, OR
• 15 years of relevant Systems Administration experience without a degree (additional 5 years can substitute for the degree).
• Strong Linux administration experience with CentOS 7, Rocky Linux 9, and RHEL 9.

Responsibilities

• Configure, manage, patch, and maintain Linux (CentOS 7, Rocky 9, RHEL 9) and Windows OS across enterprise environments.
• Provide Tier 1 and Tier 2 troubleshooting and incident diagnosis for client, server, storage, and network components.
• Perform hardware/software installations, system upgrades, and migrations for servers and workstations.
• Support STE requirements and secure data transfer workflows.
• Optimize system operations, capacity planning, and performance analysis.
• Manage ticket escalations and track hardware dispatch resolution workflows.
• Ensure network component integrity and OS enhancements.

Skills

Security clearance TS/SCI

Linux system administration

Troubleshooting

Stakeholder communication

Capacity planning

Education

Bachelor’s degree in technical field

15 years of systems administration without degree

Tools

Ansible

Proxmox

PXE network booting

LDAP IDM integration

Job description

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

• 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.