Install, manage, and support a global enterprise Messaging and Directory Services infrastructure, including Microsoft Active Directory, Entra (Azure AD), Entra Connect Sync, ADLDS, Purview, Exchange, and Exchange Online, Provide professional operational support by troubleshooting and resolving issues related to Messaging and Directory Services, Support multi-domain directory services environments based on Microsoft Windows Server 2016 and newer versions, Handle Level 2 and Level 3 escalation support for incidents related to messaging, directory services, and Microsoft 365, Manage incidents, service requests, and change requests using the central ticketing system (ServiceNow), Assist in planning and implementing changes, projects, and system upgrades, Coordinate with application operations teams to plan and execute updates and processes within your responsibility area, Collaborate closely with other infrastructure teams, including Datacenter, Network, Telecom, Security, and Digital Workplace teams, Create and maintain detailed documentation of messaging and directory services for both on-premises datacenters and cloud environments. 3 years of experience with Microsoft 365 services covering Entra (Azure AD), Exchange Online, and Purview, Minimum of 3 years of experience with on-premise Microsoft Active Directory and Exchange, At least 2 years of experience working with email security gateways, such as Cisco Secure Email Gateway, Experience with Mobile Device Management in enterprise environment, Familiarity with Microsoft Intune and Microsoft Teams, Microsoft Certified: Identity and Access Administrator Associate certification is preferred.