You’ll work across a highly available environment that includes 300+ domain controllers, approximately 300,000 Entra ID users, hundreds of thousands of joined devices, and Virtual Directory Services, with responsibility for keeping critical authentication infrastructure stable, secure, and resilient. The team is looking for a true lead-level infrastructure engineer and SME who can walk into a large, complex identity environment, troubleshoot issues others can’t easily solve, challenge existing approaches, and identify better ways to engineer and operate the platform.