Microsoft Infrastructure Architect – Exchange & Identity

About the role

We are seeking an experienced Microsoft Infrastructure Architect – Exchange & Identity to design, implement, and optimize enterprise messaging, directory services, and hybrid identity solutions across on-premises and cloud environments. The ideal candidate must possess strong hands-on technical expertise and architectural experience in on-premises Microsoft Exchange Server, Active Directory (AD), Microsoft Entra ID Connect Sync, and Exchange Hybrid Configuration. This role requires the ability to lead complex infrastructure implementations, troubleshoot advanced technical issues, and develop secure, scalable, and resilient hybrid infrastructure solutions.

Key responsibilities

• Design, implement, administer, and optimize on-premises Microsoft Exchange Server environments
• Lead Exchange Server upgrades, infrastructure modernization, migrations, and integration with Exchange Online
• Design and manage mailbox databases, mail flow, transport rules, connectors, and email routing
• Troubleshoot complex Exchange issues involving mailbox access, message delivery, connectivity, and server performance
• Develop high-availability, disaster recovery, and business continuity strategies for enterprise messaging environments
• Plan and execute mailbox migrations from on-premises Exchange to Exchange Online while maintaining service continuity
• Design, implement, and maintain enterprise Active Directory Domain Services architecture
• Manage AD domains, forests, organizational units (OUs), Group Policy, DNS integration, and directory replication
• Design, implement, configure, and maintain Microsoft Entra ID Connect Sync to synchronize identities between on-premises Active Directory and Microsoft Entra ID
• Architect, implement, and manage Exchange Hybrid environments connecting on-premises Exchange Server with Exchange Online

About you

• Bachelor's degree in Information Technology, Computer Science, Computer Engineering, or a related discipline, or equivalent professional experience
• 8–10+ years of experience in Microsoft infrastructure, messaging, identity management, or enterprise systems engineering
• 3–5+ years of experience in infrastructure architecture, solution design, or technical leadership
• Proven hands-on experience administering and designing on-premises Microsoft Exchange Server environments
• Strong expertise in Active Directory Domain Services architecture and administration
• Demonstrated implementation and troubleshooting experience with Microsoft Entra ID Connect Sync
• Proven experience designing, implementing, and supporting Exchange Hybrid environments
• Experience leading enterprise messaging migrations, hybrid identity implementations, and infrastructure modernization projects
• Strong PowerShell scripting, technical documentation, troubleshooting, and stakeholder management skills