Senior Active Directory & Identity Infrastructure Lead

My client is a top-tier multinational financial services institution with a massive global footprint. They are currently looking for a senior-level infrastructure Subject Matter Expert to take technical ownership of their core Active Directory (AD), Windows and Identity ecosystems. This is a highly technical, hands‑on role focusing on mission‑critical architecture, high availability, and Tier‑0 security in a complex enterprise environment.
The Mandate
Oversee, optimize, and engineer the enterprise Windows Server landscape, ensuring maximum performance and uptime.
Drive the architecture, health, and support of complex Active Directory environments, including forest/domain design, OU structures, GPOs, and replication topologies.
Lead the integration of hybrid identity solutions, seamlessly bridging on‑premise AD with Microsoft Entra ID and M365.
Architect and maintain secure authentication, federation platforms, and Single Sign‑On (SSO) utilizing ADFS.
Secure, design, a...