Active Directory​/Quest Engineer

Position Overview We are seeking an expert-level Active Directory / Quest Migration Engineer to plan, execute, and optimize Active Directory operations in a large-scale, mission-critical environment.

This engineer will serve as the primary subject-matter expert for Quest migration tools and oversee ongoing migrations involving more than 35,000 workstations, along with servers, applications, users, and other directory objects. The position requires extensive experience with on-premises Active Directory, domain consolidation, hybrid identity, Microsoft Entra , Power Shell automation, and Active Directory security.

Key Responsibilities Plan, execute, and optimize on-premises Active Directory operations.

Design, deploy, administer, and support domain controllers, domains, forests, trusts, Sites and Services, and Group Policy Objects.

Serve as the primary subject-matter expert for Quest migration tools.

Oversee ongoing domain migrations involving more than 35,000 workstations, as well as server and application transitions.

Migrate legacy domains into a consolidated, modern Active Directory structure.

Address stalled migration initiatives through automation, process improvements, and Active Directory best practices.

Manage hybrid Active Directory configurations and synchronization between on-premises AD and Microsoft Entra  Azure AD Connect.

Support identity federation, Conditional Access policies, Pass-through Authentication, single sign-on, and cloud identity management.

Support cloud integration for an environment in which approximately 20% of workloads are cloud-native.

Troubleshoot complex Active Directory issues, including replication failures, DFS-R/SYSVOL, DNS integration, schema extensions, Certificate Services, and performance problems.

Identify and remediate Active Directory security vulnerabilities, including issues involving Kerberos and LDAP hardening.

Support the integration of legacy domains associated with merger and acquisition activity.

Develop and maintain Power Shell scripts for Active Directory administration, querying, reporting, and bulk operations.

Develop automation for AD health monitoring, backup and recovery, compliance, and migration operations.

Use ADDS, Data Dog, or other third-party tools to support monitoring and operational visibility.

Collaborate with security, application, networking, and infrastructure teams to assess migration dependencies.

Identify and mitigate technical risks while minimizing downtime during critical migration activities.

Implement Active Directory security best practices, including least privilege, auditing, compliance, and Privileged Access Management.

Evaluate tools and technologies that support Active Directory and hybrid identity environments.

Create technical roadmaps for domain consolidation and hybrid expansion.

Provide regular project and migration updates to leadership.

Guide technical teams, mentor peers, and influence engineering decisions without direct managerial authority.

Required Qualifications Bachelor’s degree in Computer Science, Information Technology, or a related field, or equivalent professional experience.

At least 7 years of hands-on experience with on-premises Active Directory.

At least 3 years of experience in engineering.

At least 2 years of experience supporting hybrid Active Directory and Microsoft Entra .Deep expertise in Active Directory architecture, including:

Multi-domain and multi-forest environments

Domain and forest trusts

Domain controllers

Active Directory Sites and Services Schema modifications

Organizational Unit design

Replication topology

Strong understanding of Quest migration tools and the ability to serve as the primary Quest migration expert.

Proven experience completing large-scale Active Directory migrations using tools such as:

Quest Migration Manager Active Directory Migration Tool Power Shell Experience  migrating users and Active Directory objects erience with domain consolidation and SID History preservation.

Experience overseeing workstation, server, and application transitions between legacy and target domains.

Extensive experience troubleshooting:

Active Directory replicationDFS-R and SYSVOLDNS integration AD Certificate Services and PKIGroup Policy processing

Authentication and performance issues

Strong Group Policy experience, including inheritance, filtering, deployment, and troubleshooting in complex environments.

Strong knowledge of hybrid identity and cloud identity management, including:

Microsoft Entra IDAzure AD Connect Pass-through…