Windows Systems Administrator – TS/SCI with Polygraph

General Dynamics Information Technology

Windows Systems Administrator supporting enterprise infrastructure services to operate, secure, and sustain Windows server and client platforms across dynamic environments.

Posted 6/16/2026full-timeAnnapolis Junction • Colorado, District of Columbia, Florida, Maryland, Virginia • 🇺🇸 United StatesSeniorLead💰 $111,155 - $150,385 per yearWebsite

ATS Keywords

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Hard Skills

Windows ServerWindows client OSActive DirectoryGroup PolicyPowerShellOS deployment toolingSTIG compliancevulnerability remediationconfiguration compliance auditingserver virtualization

Soft Skills

documentationcommunicationcollaborationtroubleshootingroot cause analysisproblem-solvingorganizational skillslifecycle planningcoordinationdiagnosing complex issues

Tools & Technologies

cloud environmentsvirtual machineshypervisorsenterprise servicesmonitoring toolsbackup/restore systemsfirmware update toolsSCAP reportssecurity patching toolsconfiguration management systems

Certifications & Qualifications

TS/SCI clearanceSecurity+ CEDoD 8140 Information Assurance Workforce certification

Industry Keywords

enterprise hardeningcompliance baselinesconfiguration baselinesnetwork domainscybersecuritydependency mappingservice availability monitoringOS hardening practicesmultinetwork environmentsauthentication issues

Tech Stack

Tools & technologies

CloudCyber SecurityTypeScript

About the role

Key responsibilities & impact

Administer, operate, and maintain Windows server and endpoint systems across physical, virtual, and cloud environments, ensuring stability, performance, and secure configurations
Perform Tier II/III troubleshooting and root cause analysis for OS level, authentication, GPO, networking, and dependency related issues supporting enterprise services
Manage configuration baselines, apply required updates, support lifecycle planning, and maintain accurate documentation for change, configuration, and operational processes
Support Active Directory, Group Policy, certificate services, server roles, and related identity, access, and configuration services across multiple network domains
Maintain, monitor, and update Windows systems for compliance with security baselines, STIG settings, and enterprise hardening requirements
Coordinate with engineering, cybersecurity, monitoring, and platform teams to ensure secure integrations, dependency mapping, and seamless operations
Maintain server virtualization environments, including building, updating, and troubleshooting virtual machines, templates, hypervisors, and supporting infrastructure
Support operational tasks such as firmware updates, system provisioning, backup/restore activities, template updates, and service availability monitoring
Execute Windows OS and security patching across assigned systems, deploying enterprise approved updates, baseline releases, and third-party patches to maintain security and configuration compliance
Identify and remediate noncompliant systems by reviewing vulnerability and SCAP reports, diagnosing root causes, coordinating corrective actions, and validating remediation across multiple networks

Requirements

What you’ll need

8+ years of related experience
US Citizenship Required: Yes
Active TS/SCI clearance with a favorable polygraph
Bachelor’s degree in an IT-related field, or 10+ years of relevant IT experience in lieu of a degree
Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE, etc.)
Hands on experience administering Windows Server and Windows client OS in enterprise or multinetwork environments
Proficiency with Active Directory, GPO creation/troubleshooting, OS deployment tooling, and PowerShell automation
Experience implementing secure configurations, STIG/HBSS compliance, and OS hardening practices
Familiarity with enterprise patch management, vulnerability remediation, and configuration compliance auditing
Ability to diagnose and resolve complex OS, authentication, and configuration issues across distributed infrastructure
Strong documentation, communication, and collaboration skills.

Benefits

Comp & perks

Comprehensive benefits and wellness packages
401K with company match
Competitive pay
Paid time off
Full flex work weeks
Variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave
Short and long-term disability benefits
Life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance