Architects and secures enterprise Active Directory, DNS/DHCP, and PKI environments, GPO governance, privileged access segmentation, high availability service configuration, certificate lifecycle automation, and integration with MFA based authentication and device trust systems. Subject Matter Expert: Expert level knowledge of applicable functional areas such as Windows Domain environment (AD, DNS, DHCP, GPO, PKI), Microsoft 365 ecosystem, Windows Servers, security patching and vulnerability mitigation in a Windows environment.