Activity Directory Administrator

Clearance Level
Systems Administration
Falls Church, Virginia
Hybrid Workplace
Key Skills For Success

Active Directory (AD)

Enterprise IT Infrastructure

Information Technology (IT) Services

Microsoft Windows Server

REQ#: RQ146717
Requisition Type: Regular
Your Impact

Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the Department of Defense’s mission to keep our country safe and secure.

Job Description

Active Directory System Administrator position supporting the Army National Guard (ARNG) in Falls Church, VA.

This is an IT Service Management contract in support of the operation, modernization, expansion, and further evolution of the ARNG’s global Information Technology (IT) services including networking, compute, storage, infrastructure, applications, hosting, and program management services.  The GECOS program supports the ARNG enterprise IT infrastructure, its Wide Area Network (WAN), authentication and directory services, cybersecurity, application hosting, and associated services. GECOS uses ITIL best practices framework as the basis for IT Service Management (ITSM) model.


  • Install, configure, and maintain Active Directory and third-party software utilities for hardware systems within operational guidelines.
  • Produce global enterprise-level designs for secure Active Directory and Identity systems for global initiatives.
  • Monitor systems for vulnerabilities, track, prioritize remediate or mitigate per policies.
  • Perform root cause analysis and problem management for corporate Identity Management environment.
  • Lead projects through implementation via collaboration with all IT, security and support teams.
  • Create and maintain system documentation for domain technologies, including installation, configuration, and appropriate troubleshooting steps.
  • Identify opportunities and improve existing processes through solutions to recurring problems and enhancements to existing solutions or documentation.
  • Document processes and solutions.
  • Provide support for implementation, troubleshooting and maintenance of IT systems.
  • Manage IT system infrastructure and any processes related to these systems.
  • Provide support to IT systems including day-to-day operations, monitoring and problem resolution for Active Directory task and activities.
  • Provide Tier 3 problem identification, diagnosis, and resolution of problem.
  • Provide support for the escalation and communication of status to agency management and internal customers.
  • Provide support for the dispatch system and hardware problems and remains involved in the resolution process.
  • Install/load operating system and application software.
  • Integrate new technologies into new and existing systems including the transition and migration of corporate systems.


  • Education: Bachelors; 10+ years of experience may substitute
  • Required Experience: 6+ years IT System Admin experience
    • Experience working with Microsoft Identity technologies including Active Directory, Certificate Services, Lightweight Directory Services, Group Policy, Single Sign On and Multi-Faction Authorization solutions.
    • Experience working with large AD enterprises to include DNS and DHCP technologies.
    • Experience working with MECM ( Microsoft Endpoint Configuration Manager)
    • Experience working with Microsoft RDS (Remote Desktop Services)
    • Experience working with Microsoft Exchange
    • Experience working with Microsoft Print Services
    • Experience working in large DoD enterprise network environments.
    • Experience working with DISA STIGs
  • Required Technical Skills: IT experience supporting large enterprise Active Directory environments.
  • Certifications: Must meet DoD IAT Level II IA and baseline certification at start date; Ability to obtain ITIL within 6 months of start date and IAT Level II certifications
  • Security Clearance Level: SECRET Clearance
  • Required Skills and Abilities: Superb communication skills; strong ability to multi-task
  • Location: On Customer Site with up to 2 days telework option


  • 401K with company match
  • Comprehensive health and wellness packages
  • Internal mobility team dedicated to helping you own your career
  • Professional growth opportunities including paid education and certifications
  • Cutting-edge technology you can learn from
  • Rest and recharge with paid vacation and holidays



    Work Requirements
    Years of Experience

    6 + years of related experience

    * may vary based on technical training, certification(s), or degree


    CompTIA - Security+ CE - CompTIA

    Travel Required

    Less than 10%


    U.S. Citizenship Required

    About Our Work

    We are GDIT. The people supporting some of the most complex government, defense, and intelligence projects across the country. We deliver. Bringing the expertise needed to understand and advance critical missions. We transform. Shifting the ways clients invest in, integrate, and innovate technology solutions. We ensure today is safe and tomorrow is smarter. We are there. On the ground, beside our clients, in the lab, and everywhere in between. Offering the technology transformations, strategy, and mission services needed to get the job done.

    COVID-19 Vaccination

    GDIT does not have a vaccination mandate applicable to all employees. To protect the health and safety of its employees and to comply with customer requirements, however, GDIT may require employees in certain positions to be fully vaccinated against COVID-19. Vaccination requirements will depend on customer site requirements.

    GDIT is 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, or veteran status, or any other protected class.