Active Directory Systems Administrator – TS/SCI w/Poly

General Dynamics Information Technology

Active Directory Systems Administrator at GDIT managing Active Directory services for national defense operations. Collaborating with cybersecurity and operations teams to enhance directory services and security.

Posted 6/12/2026full-timeAnnapolis Junction • Colorado, Florida, Maryland, Virginia, Washington • 🇺🇸 United StatesLead💰 $96,569 - $130,651 per yearWebsite

Tech Stack

Tools & technologies

DNSTypeScript

About the role

Key responsibilities & impact

Administer and maintain Active Directory forests, domains, trust relationships, replication services, and enterprise directory components
Manage and troubleshoot identity services, including DNS integrated AD functions, authentication, Kerberos/NTLM, group membership, and object lifecycle management
Create, maintain, and troubleshoot Group Policy Objects (GPOs)
Perform Tier 2/3 directory service support
Support AD integrated services including certificate services, federation services, domain controllers, and directory dependent applications
Execute domain controller deployments, configuration updates, schema extensions, and lifecycle upgrades
Monitor AD health, replication status, event logs, and performance
Maintain directory service documentation, configuration baselines, and operational procedures

Requirements

What you’ll need

4+ years of related experience
Active Directory Domain Services (AD DS)
Active Directory Federation Services (AD FS)
Domain Controllers
Group Policy
Group Policy Objects (GPO)
Active TS/SCI clearance with a favorable polygraph
Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE, etc.)

Benefits

Comp & perks

Health insurance
401(k) with company match
Paid time off
Flexible work arrangements
Professional development opportunities

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Active DirectoryGroup PolicyGroup Policy ObjectsDomain ControllersDNSKerberosNTLMidentity servicesdirectory service supportschema extensions

Certifications

Active TS/SCI clearanceSecurity+ CEDoD 8140 Information Assurance Workforce certification