Senior Windows System Administrator (TS/SCI Clearance With Full Scope Polygraph Required)

J&T Business Consulting; Annapolis (MD); On-site; USD 188,000 - 210,000; Full time

Job summary

J&T Business Consulting seeks a Senior Windows System Administrator in Annapolis, MD, to support a high-security program. The role covers daily sysadmin tasks, O&M, and vulnerability remediation across virtual Windows infrastructure.

Candidates must hold TS/SCI with poly; 7+ years of Windows admin experience; strong governance, RMF, and configuration management skills. On-site, full-time position with competitive compensation.

Qualifications

• Active TS/SCI with polygraph clearance.
• Minimum 7 years of Windows systems administration experience.
• Experience in information security governance, risk management, and RMF processes.
• Hands-on with AD, DNS, GPOs, and Exchange administration.

Responsibilities

• Maintain and operate multiple Windows server clusters and AD/DNS environments.
• Apply patches, manage vulnerability scans, and remediate IAVAs.
• Monitor systems with enterprise tools and respond to outages.
• Document procedures and support IT modernization efforts.
• Provide on-call troubleshooting and cross-functional collaboration.

Skills

Active Directory

DNS

Group Policy

PowerShell

IAVA management

Windows OS

VMware virtualization

Education

Bachelor's degree in Computer Science / IT

Tools

Exchange Management Shell

VMware vSphere

Job description

Senior Windows System Administrator (TS/SCI Clearance With Full Scope Polygraph Required)

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

Position: Senior Windows System Administrator

Location: Annapolis Junction, MD

Position Type: Full-Time

Security Clearance: TS/SCI with Polygraph

Compensation: $188,000 – $210,000

Role Overview

We are seeking an experienced Senior Windows System Administrator to join a high-performing Agile team operating within the Scaled Agile Framework (SAFe) in support of a complex, fast-paced program. In this role, you will deliver daily systems administration and operations & maintenance (O&M) support across geographically dispersed systems. Key responsibilities include responding to systems engineering requests that fulfill operational needs, as well as engineering, deploying, and sustaining capabilities across virtualized Windows infrastructure.

Primary Responsibilities

• Maintain multiple virtual server clusters, resolve system scan findings, implement vulnerability management patching, and handle Active Directory configuration issues.
• Utilize enterprise monitoring tools to detect, assess, and remediate alerts and outages.
• Provide technical support and collaborate cross-functionally with partner workgroups on overlapping engineering initiatives.
• Manage Information Assurance Vulnerability Alerts (IAVAs) and system security scans in alignment with System Security Plans (SSPs), ensuring timely vulnerability remediation.
• Execute monthly security scans, implement remediation measures, and deploy security patches/updates to designated environments.
• Diagnose, troubleshoot, and resolve hardware and software system failures.
• Communicate system outages, publish maintenance status updates, and proactively alert stakeholders to infrastructure delays that may impact operational functions.
• Author and maintain comprehensive, precise technical documentation and standard operating procedures (SOPs).
• Plan and execute IT modernization enhancements while supporting program project milestones.
• Support operations and maintenance troubleshooting on an on-call rotation as required.

Required Qualifications

Clearance: Active TS/SCI security clearance with a current polygraph.

Experience: Minimum 7 years of dedicated Windows systems administration experience.

Security & Governance: Minimum 7 years of experience in information security management, demonstrating knowledge of security governance, risk management, compliance, and operational security functions.

Core Technical Competencies (5+ years of hands-on experience with each):

• Implementing and administering Windows Active Directory (AD) and DNS environments.
• Designing, configuring, and managing Group Policy Objects (GPOs).
• Microsoft Exchange administration, including Exchange Management Shell.

Scripting & CLI: Hands‑on proficiency with Windows Command Line, PowerShell, and automated PowerShell scripting.

Vulnerability Management: Direct experience with IAVA management and vulnerability remediation processes.

Systems Familiarity: Working knowledge of Windows and Linux operating systems, VMware virtualization, and core enterprise networking concepts (switches, routers, LANs, and cabling infrastructure).

Demonstrated commitment to change management protocols, maintenance windows, and ITIL best practices.

Desired Qualifications

Bachelor's degree in Computer Science, Information Technology, or a related technical discipline with 12+ years of relevant experience.

Experience documenting and supporting security accreditation and authorization (A&A / RMF) processes.

Familiarity with network security technologies, including multi-domain architectures, Public Key Infrastructure (PKI), SSPs, and vulnerability scanning tools.

Experience with enterprise data center deployment, including rack‑and‑stack, power planning, and hardware placement.

Direct experience administering VMware vSphere environments.

Experience with configuration automation frameworks such as Ansible or SaltStack.

Prior background serving as a System Administrator supporting software configuration management and development pipelines.