Mid/Sr System Administrator (TS/SCI Clearance with Full Scope Polygraph Required)

J&T Business Consulting; Annapolis (MD); On-site; USD 100,000 - 200,000; Full time

Benefits offered by this job

Health insurance

401(k) retirement plan with company 
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Tuition reimbursement

Job summary

J&T Business Consulting in Annapolis, MD, is seeking a Mid/Sr System Administrator with active TS/SCI clearance and Polygraph to support a distributed network environment. You will handle full-lifecycle administration, patching, and security compliance across air-gapped enclaves to maximize uptime.

Responsibilities include AD management, Windows/Linux administration, virtualization (VMware), vulnerability management, automation with SaltStack/Ansible/PowerShell, and thorough documentation.

Qualifications

• Bachelor’s degree in a technical field plus at least 8 years of relevant systems administration experience or an equivalent combination of education and hands-on experience.
• Experience with Windows Server 2019 and Active Directory; familiarity with RHEL is a plus.
• Proficiency with virtualization, enterprise monitoring, automation, and security tooling.

Responsibilities

• Install, configure, and maintain Windows and Linux server/desktop environments across air-gapped enclaves.
• Manage Active Directory, domain services, group policies, and access controls.

Skills

Windows Server 2019

Active Directory

VMware

Automation scripting

PowerShell

Python

Security tools

Windows/Linux admin

Education

Bachelor’s degree in Systems Engineering, Computer Science, Information Systems, Engineering Management, or related

Tools

SaltStack

Ansible

Splunk

Puppet

SolarWinds

Nessus

VMware

Job description

Mid/Sr System Administrator (TS/SCI Clearance with Full Scope Polygraph Required)

Annapolis, United States | Posted on 11/05/2026

Clearance Requirement: Active TS/SCI with Polygraph

Salary Range: $100,000 – $200,000 / year (dependent on experience, education, and skill set)

About the Role

Seeking an energetic and experienced Mid/Sr System Administrator to support a large, complex, and geographically distributed network environment in Annapolis Junction, MD.

In this role, you will deliver full-lifecycle systems administration, operations, and maintenance across multiple air-gapped enclaves, each featuring dedicated domains, storage architectures, and network infrastructure. You will be responsible for deploying, patching, and optimizing server and desktop environments, driving security compliance, and troubleshooting complex hardware and software issues to ensure maximum operational uptime.

Key Responsibilities

Install, configure, optimize, and maintain Windows and Linux server/desktop configurations across complex, air-gapped enclaves.

Administer, sustain, and troubleshoot web-based information sharing and storage application environments.

Manage Active Directory, domain services, group policies, certificate renewals, and access controls.

Execute system scanning, vulnerability management, security patching, and vulnerability mitigation using automated tools.

Perform client and server virtualization management, virtual machine provisioning, and hardware reimaging/troubleshooting.

Maintain comprehensive documentation of server and network architectures to facilitate rapid incident response and knowledge sharing.

Communicate system status, scheduled maintenance, and outage resolutions with end users, technical teams, and program leadership.

Support occasional short-duration local/day travel and handle physical equipment handling (up to 50 lbs).

Required Qualifications & Experience

Security Clearance: Active TS/SCI with Polygraph.

Education & Experience:

Bachelor’s degree in Systems Engineering, Computer Science, Information Systems, Engineering Management, or a related technical discipline plus at least 8 years of relevant systems administration experience, OR

Equivalent combination of additional years of hands‑on technical experience substituting for the degree.

Operating Systems & Directory Services: Proficiency with Windows Server 2019, Active Directory, and foundational knowledge of Red Hat Enterprise Linux (RHEL).

Virtualization: Hands‑on experience administering client and server virtualization platforms (e.g., VMware).

Enterprise Tools: Demonstrated familiarity with enterprise monitoring, automation, and security tools (e.g., SaltStack, Ansible, Splunk, Puppet, SolarWinds, Nessus).

Hardware & Operations: Proven ability to install, configure, troubleshoot, reimage, back up, and restore enterprise server and desktop hardware.

Physical & Travel Requirements: Ability to lift up to 50 lbs and support occasional day or short‑duration travel.

Desired Qualifications

Proficiency with Microsoft SQL Server administration.

Automation and scripting experience using Python, SaltStack, PowerShell, and PowerCLI.

Background supporting software configuration management and development staging environments.

Experience working within Agile frameworks and delivery teams.

Working knowledge of PKI architectures utilizing Hardware Security Modules (HSMs) and NTP synchronization.

Experience generating documentation and technical evidence for system security authorization and accreditation packages.

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.