Windows Systems Administrator - TS/SCI with Polygraph

General Dynamics Information Technology • Washington, DC

1d • $111,155 - $150,385 • Onsite

About The Position

Own your opportunity to support national defense. Your work will help keep critical operations secure and connected across the global enterprise directly, contributing to a mission that protects our nation every day. CIO Infrastructure Services (CIS) is growing, and we invite both our experienced incumbents and new team members to be part of what’s next. Incumbents bring invaluable mission insight, while new talent adds fresh ideas and energy. Together, we’ll strengthen continuity and drive the next generation of innovation. As a Windows Systems Administrator supporting enterprise infrastructure services, you will operate, secure, and sustain Windows server and client platforms across dynamic multinetwork environments. You will ensure stable operations, maintain compliance with security and configuration standards, and support mission critical services that require high availability and rapid issue resolution. Your contributions directly improve system reliability, resilience, and readiness across globally distributed environments.

Requirements

• Active TS/SCI clearance with a favorable polygraph
• 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
• US citizenship required

Nice To Haves

• 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.)

Responsibilities

• 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

Benefits

• Variety of medical plan options, some with Health Savings Accounts
• Dental plan options
• Vision plan
• 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match
• Full flex work weeks where possible
• 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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior