Senior Linux Systems Administrator - TS/SCI with Poly

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

Benefits offered by this job

Health, Dental & Vision Insurance

Life and Disability Insurance

Paid Time Off and Holidays

401(k) with company match

Tuition Reimbursement

Job summary

J&T Business Consulting is seeking an experienced Linux System Administrator with an active TS/SCI clearance and full polygraph. Based in Annapolis Junction, MD, you will manage enterprise Linux and Windows environments, handle Tier 1–2 escalations, and support secure data transfer workflows across multiple platforms.

The role emphasizes hardware/software upgrades, capacity planning, and ongoing performance optimization.

Qualifications

• Bachelor’s degree in a technical discipline 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).
• Strong hands‑on experience administering CentOS 7, Rocky Linux 9, and Red Hat Enterprise Linux (RHEL 9).
• Proven experience handling physical server/workstation installations, system refreshes, and hardware troubleshooting.

Responsibilities

• Configure, manage, patch, and maintain enterprise Linux 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 STE requirements and secure data transfer processes.
• Optimize system operations and resource allocation; perform capacity planning and performance analysis.

Skills

Linux administration

Windows administration

Troubleshooting

Server hardware

Education

Bachelor’s degree in a technical discipline

15 years systems administration experience without a degree

Tools

Ansible

Proxmox

PXE booting

LDAP IDM

TLS certificates

Job description

J&T Business Consulting is seeking an experienced Linux System Administrator with an active TS/SCI clearance and full polygraph. Based in Annapolis Junction, MD, you will manage enterprise Linux and Windows environments, handle Tier 1–2 escalations, and support secure data transfer workflows across multiple platforms.

The role emphasizes hardware/software upgrades, capacity planning, and ongoing performance optimization.