Systems Administrator II | Active Directory - Crystal City, VA

Epsilon - Arlington, VA

Full-time - Mid Level

Arlington, VA

Professional, Scientific, and Technical Services

About the position

The Systems Administrator II | Active Directory role at Epsilon involves supporting the administration and maintenance of IT infrastructures for a large federal enterprise effort. This position requires collaboration with senior administrators and IT teams to ensure system performance, security, and reliability, particularly focusing on Active Directory and related technologies.

Responsibilities

• Support the deployment, configuration, and maintenance of operating systems and applications.
• Work with virtualization technologies, such as VMware and Hyper-V, to support virtual environments.
• Implement basic security measures, including system hardening and routine patching.
• Assist with managing storage solutions (SAN, NAS) and backup/recovery operations.
• Participate in system upgrades, migrations, and disaster recovery activities.
• Maintain documentation for system configurations, procedures, and standard operating guidelines.
• Troubleshoot and resolve routine system issues and respond to service requests.
• Collaborate with network, security, and application teams to ensure system compatibility and integration.
• Provide input on system design and enhancements, contributing to the improvement of the overall infrastructure.
• Design, implement and maintain Active Directory infrastructure including forests, domains, OUs, and domain controllers while ensuring optimal replication and performance.
• Manage user accounts, groups, and security policies including creation, modification, deletion, and password management while maintaining accurate documentation.
• Implement and maintain Group Policy Objects (GPOs) for security, software deployment, and system configurations across the organization.
• Monitor and maintain Active Directory health, including regular backups, database maintenance, performance optimization, and disaster recovery procedures.
• Configure and manage DNS/DHCP services, certificate services, and multi-factor authentication systems.
• Handle AD integration with other enterprise systems, including Azure AD sync and hybrid environment management.
• Provide advanced technical support for AD-related issues, including troubleshooting authentication, replication, and access problems.
• Ensure compliance with security policies through regular auditing, monitoring security logs, and maintaining required documentation.
• Plan and execute AD-related projects including upgrades, migrations, and implementation of new features while coordinating with other IT teams.

Requirements

• U.S. Citizenship is required for this position.
• Bachelor's degree in Computer Science, Information Technology, or related field.
• 3+ years of Windows Server administration experience.
• 2+ years of hands-on Active Directory administration experience.
• Desired Microsoft certification in Windows Server, plus at least one advanced certification (Microsoft 365 Enterprise Admin, MCSE Core Infrastructure, or Identity and Access Administrator).
• Proven experience with Active Directory core services including AD DS, Domain Controller management, OU structure, Group Policy, DNS/DHCP, and replication.
• Strong knowledge of Windows Server infrastructure, including PowerShell scripting, GPO management, networking, and certificate services.
• Demonstrated expertise in AD security best practices, including authentication protocols, access control, security groups, password policies, and multi-factor authentication.
• Experience with AD troubleshooting, performance monitoring, backup/recovery procedures, and change management.
• Proficiency in user/group management, system documentation, and Azure AD integration for hybrid environments.
• Strong problem-solving and communication skills, with ability to work in a team environment and provide user support.
• Knowledge of LDAP, AD migration tools, AD diagnostic tools, and automation capabilities.

Benefits

• $3,000 annually in Professional Development funds.
• Competitive pay.
• Comprehensive benefits through one of the largest national carriers.
• Paid Time Off (PTO) that increases with tenure and has a generous rollover.
• 11 company paid Holidays.
• 401(k) with immediate contribution.