Senior Active Directory Architect

We are seeking a Senior Active Directory Architect to support the design, modernization, and standardization of directory services across a complex hybrid enterprise environment.

This role focuses primarily on Active Directory architecture in a multi-domain hybrid landscape. The successful candidate will help define and implement the strategic direction for Active Directory and its integration with Microsoft Entra , establishing a secure, scalable, and maintainable model across multiple countries and environments.

The position combines architectural design, technical leadership, and hands‑on expertise to improve the current platform, remediate legacy issues, and support modernization initiatives across SYNLAB.

While the primary focus is on on‑premises Active Directory and hybrid identity, the role also requires solid understanding of Microsoft 365 identity dependencies, particularly Microsoft Entra , Exchange hybrid, and identity‑related integration points with endpoint management.

• Assess and document the current Active Directory landscape across multiple environments.
• Define and implement target architecture and standards for Active Directory.
• Improve OU structures, delegation models, tiering, and Group Policy design.
• Address architectural inconsistencies and legacy configuration issues.

• Lead remediation of architectural weaknesses, security findings, and legacy Active Directory issues.
• Troubleshoot complex directory and authentication issues across domains and hybrid environments.
• Drive improvements in directory design, authentication, and operational resilience.
• Strengthen Active Directory resiliency, recovery preparedness, and restore processes.

• Ensure reliable integration between Active Directory and Microsoft Entra .
• Support and improve directory synchronization architecture, troubleshooting, and operational stability.
• Contribute to standards for authentication, administration, and lifecycle processes across hybrid identity.
• Provide architectural input into identity‑related dependencies across Microsoft 365, particularly Microsoft Entra , Exchange hybrid, and endpoint identity integration with Intune.
• Support design decisions affecting access, device identity, and cloud‑connected provisioning.

• Act as the technical authority for Active Directory within the Workplace team.
• Provide technical guidance to the team.
• Support identity‑related architectural decisions across infrastructure projects.
• Work closely with infrastructure and application teams across the organization.
• Align directory and hybrid identity design with broader infrastructure and security initiatives.
• Support technical workshops and coordination with country IT teams where required.

• Strong experience designing and operating enterprise Active Directory environments.
• Experience working in large, complex AD environments (multiple domains, trusts, or distributed environments).
• Deep knowledge of AD domain architecture, OU structure and delegation models, Group Policy architecture, authentication and identity security.
• Ability to analyze legacy environments and define practical remediations.
• Deep knowledge of directory synchronization (Entra /Cloud Sync).
• Solid understanding of Microsoft Entra  beyond synchronization, including authentication methods, hybrid identity design, and identity‑related access controls.
• Experience with Exchange hybrid identity dependencies, including recipient‑related Active Directory attributes and operational considerations.
• Good understanding of identity dependencies for Microsoft Intune and Entra‑joined / hybrid‑joined devices.
• Experience with identity lifecycle automation and provisioning flows across HR systems, Active Directory, and Microsoft Entra .
• Strong troubleshooting capabilities in complex identity infrastructures.
• Ability to handle both architectural topics and deep technical issues.
• Ability to work independently, drive delivery end‑to‑end, and follow through to completion.
• Clear communication skills (technical topics to mixed…