Active Directory Systems Administrator - TS/SCI w/Poly

Req ID: RQ219424

Type of Requisition: Regular

Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph

Public Trust/Other Required: None

Job Family: IT Infrastructure and Operations

Skills:

Active Directory Domain Services (AD DS),Active Directory Federation Services (AD FS),Domain Controllers,Group Policy,Group Policy Objects (GPO)

Experience:

4 + years of related experience

US Citizenship Required:

Yes

Job Description:

ACTIVE DIRECTORY SYSTEMS ADMINISTRATOR

YOUR IMPACT

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.

MEANINGFUL WORK AND PERSONAL IMPACT

As an Active Directory Systems Administrator supporting CIS, you will sustain and secure enterprise directory services that enable authentication, authorization, and identity management across complex, multinetwork environments. You will maintain Active Directory forests, domains, and Group Policy, ensure directory service availability, and deliver reliable identity driven capabilities that underpin critical mission systems. Your work strengthens security, consistency, and operational readiness across the enterprise.

KEY RESPONSIBILITIES:

• 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) to enforce secure, standardized configurations across multiple networks and client baselines

• Perform Tier 2/3 directory service support, resolving complex AD, DNS, GPO, and authentication issues across distributed environments

• 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 in alignment with operational and security requirements

• Monitor AD health, replication status, event logs, and performance to ensure availability and integrity of directory services

• Maintain directory service documentation, configuration baselines, and operational procedures

• Collaborate with engineering, cybersecurity, and operations teams to support design changes, new identity capabilities, and secure directory implementations

• Execute patching and compliance tasks for AD, DNS, and directory integrated systems

• Identify and remediate patching gaps, and document corrective actions

WHAT YOU'LL NEED TO SUCCEED

• EXPERIENCE REQUIREMENTS: Systems Administrator Senior - Requires a Bachelor's degree in an IT-related field or 4 years of relevant IT experience in lieu of a degree. Systems Administrator Senior - Requires a Bachelor's degree in an IT-related field or 6 years of relevant IT experience in lieu of a degree.

• CERTIFICATION: Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE, etc.)

• CLEARANCE: Active TS/SCI clearance with a favorable polygraph

• Hands-on experience administering AD, Group Policy, DNS, and authentication services in enterprise or multidomain environments

• Strong knowledge of AD health monitoring, replication, domain controller management, OU structure design, and secure configuration practices

• Experience troubleshooting complex authentication, GPO, DNS, and directory integrated application issues

• Familiarity with STIGs, patching workflows, vulnerability remediation, and configuration compliance requirements

• Strong documentation, communication, and cross team collaboration skills

• US citizenship required

• LOCATION: Onsite

GDIT IS YOUR PLACE

At GDIT, the mission is our purpose, and our people are at the center of everything we do.

Growth: AI-powered career tool that identifies career steps and learning opportunities

Support: An internal mobility team focused on helping you achieve your career goals

Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off

Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY

Explore an enterprise IT career at GDIT and you'll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

#CIS

The likely salary range for this position is $96,569 - $130,651. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 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. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.

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Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans