Senior Migration Architect

Job Overview We are seeking an experienced Senior Migration Architect to lead and govern large-scale enterprise email transformation projects, with a primary focus on migrating from Zimbra Email to Microsoft 365 (Office 365) . The ideal candidate will be responsible for designing migration strategies, overseeing end-to-end program governance, ensuring secure and compliant migrations, and collaborating with business, infrastructure, security, and leadership teams to deliver a seamless migration experience. The role requires strong expertise in Microsoft 365, hybrid identity, Azure AD (Microsoft Entra ID), email security, migration planning, stakeholder management, and enterprise program governance. Key Responsibilities Lead enterprise-wide migration from Zimbra email to Microsoft O365 email Develop and design migration strategy, coexistence architecture, phase wise migration plans, and cutover approach. Conducting assessment of existing email infrastructure, mailbox dependencies, security controls, and integration requirements and filling any missing security gaps. Plan DLP policies for email, SharePoint and OneDrive Prepare migration design documents including HLD, LLD, migration runbooks, rollback plans, and user transition strategy. Owning end-to-end program governance, delivery oversight, milestone tracking, and risk management for migration initiatives. Manag stakeholders across business, IT, infrastructure, security, compliance, and leadership teams. Drive implementation strategy, pilot migrations, execution planning, user onboarding, and post-migration stabilization activities. Coordinate with Microsoft and partners, system integrators, and implementation service providers. Ensure secure migration with proper user's email data protection, compliance, retention policies, and identity integration. Support Azure AD, Intra ID connect, Conditional Access, Intune, and hybrid identity integration as part of O365 transformation. Define operational governance, support readiness, monitoring, and transition to BAU support teams. Prepare governance dashboards, migration status reports, and executive presentations for steering committee reviews. Required Experience 10–15+ years of overall IT Infrastructure and Microsoft technologies experience. 5+ years of hands-on experience leading enterprise Microsoft 365 migration projects. Proven experience delivering large-scale Zimbra to Microsoft 365 migration programs. Strong experience in Microsoft 365 architecture, Exchange Online, hybrid environments, and enterprise messaging platforms. Experience managing enterprise-scale migration projects involving thousands of users. Demonstrated expertise in governance, stakeholder management, risk management, and executive reporting. Experience working with Microsoft implementation partners and system integrators.