Advanced System Administrator – Active Directory

Clearance Level
Systems Analysis
Falls Church, Virginia
Onsite Workplace
Key Skills For Success

Data Center Virtualization

Microsoft Server Operating Systems

VMware VDI

VMware vSphere

REQ#: RQ141893
Requisition Type: Regular
Your Impact

Own your opportunity to work alongside federal civilian agencies. Make an impact by providing services that help the government ensure the well being of U.S. citizens.

Job Description

We are GDIT. We stay at the forefront of innovation to solve complex technical challenges. 

GDIT is your place. Make it your own by discovering new ways to apply the latest technology securely and expertly. Own your opportunity at GDIT and you’ll be a meaningful part of improving how agencies operate. Our work depends on an Advanced System Administrator joining our team to support the Defense Health Agency (DHA) activities at their headquarters office in Falls Church, VA.

At GDIT, we foster a people-centric environment. As an Advanced System Administrator supporting the DHA EITSI Program you will be trusted to manage, maintain and keep secure Active Directory and the hosted systems and solutions hosted within CLASSIFIED (i.e. SIPR) networks. In this role, a typical day will include:

  • Collaborating with the DHA to provide innovative technical approaches and resilient IT solutions for managing Active Directory and other hosted systems and infrastructure.
  • Installs, upgrades, maintains and administers infrastructure software and hardware such as Windows Server, VMWare tools, Windows 10 OS, desktop software (e.g. web-browsers, Adobe Acrobat, etc.).
  • Integrates vendor systems, third party application servers and system software and hardware within a Windows Server environment.
  • Provides patch management by reviewing, analyzing, testing, and implementing Vendor's proposed changes, upgrades and patches; performs firmware upgrades.
  • Patches Windows Servers, Windows Operating Systems (OS), Microsoft applications, and images Windows OS workstations using Microsoft SCCM and WSUS.
  • Provides Active Directory (AD) infrastructure server and Group Policy (GPO) administration.
  • Assists with platform upgrade activities for VMWare vSphere, and ESXi.
  • Coordinates system hardware and software testing with development teams to ensure transparent implementation and appropriate capacity.
  • Investigates and proposes solutions for development and customer needs to improve reliability, continuity, and maintainability for Windows systems hardware and software.
  • Monitors and ensures that backup data and resilience methods are scheduled and functioning appropriately.
  • Resolves and documents resolution for incidents; partners across DHHQ teams to ensure continued availability.
  • Reviews the Forward Schedule of Change to ensure that capacity planning for Windows Systems software and hardware needs are available and that systems and applications will not be impacted through implementation.
  • Provides day-to-day Tier 3 support and troubleshooting for assigned systems.
  • Provisions and loads PKI certificates on servers.
  • Accurately logs tickets d tracks/owns assigned incidents.
  • Provides accurate, timely, and professional resolution on all supported issues.
  • Delivers a high level of professionalism and customer service.
  • Brings subject matter expertise in the virtualization operations area.
  • Provides updates to management and project leadership of all ongoing critical issues.
  • Your success will be measured through your contributions to maintaining performant systems and positive team/customer outcomes


  • BS Degree in Computer Science or related field with 8+ years of Technical IT experience; (or MS with 6 years, PhD with 5+ years, HS diploma with 12+ years of experience in lieu of BS degree), to include the following:
    • 4+ years’ system administration (SA) or engineering experience
    • Windows Server (2019, 2016, or 2012r2)
    • Active Directory infrastructure (deployment/upgrades)
    • Group Policy administration/Windows security
  • Have or obtain requisite DoD 8570 IAT Level II certification (e.g. Security + CE) within 60 days of beginning position.
  • Work on-site due to classified system requirements.
  • Government contract requires person possess proof of U.S. citizenship.
  • Active DoD Secret (or equivalent) clearance

Desired qualifications:

  • Window Operating System (Windows 10)
  • VMWare Server Virtualization
  • Storage Area Networks
  • Network Communication processes
  • Patch management using multiple tools (SCCM, WSUS, etc.).
  • Proficient with DoD security assessment/hardening tools (STIG, SCAP, checklists, Nessus, etc.)
  • Knowledge of batch scripting in PowerShell, VBScript, etc.
  • Strong oral and written communications skills
  • Ability to coordinate and lead multiple projects at one time
  • Ability to apply knowledge of current industry standard systems architectures
  • Strong critical thinking skills that facilitate expedient problem-solving


  • 401K with company match
  • Comprehensive health and wellness packages
  • Rest and recharge with paid vacation and holidays
  • Collaborative teams of highly motivated critical thinkers and innovators
  • Internal mobility team dedicated to helping you own your career
  • Rewards program for high-performing employees
  • Professional growth opportunities including paid education and certifications
  • Cutting-edge technology you can learn from

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Work Requirements
Years of Experience

8 + years of related experience

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


CompTIA - Security+ CE - CompTIA

Travel Required

Less than 10%

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 the status of the federal contractor mandate and 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.