Exchange Online Engineer

Job Description The Senior Systems Engineer will play a crucial role in managing and optimizing our Microsoft 365 and Azure environments, ensuring secure and efficient operations. This role involves overseeing complex cross-tenant access scenarios, M&A integrations, and domain migrations, as well as providing expertise in Power Platform, Entra ID, and email security.

• Lead the administration and governance of Microsoft 365 and Azure environments, including Exchange Online, SharePoint Online, Microsoft Teams, and Entra ID.
• Manage complex cross-tenant access scenarios, ensuring secure and efficient collaboration across multiple tenants.
• Oversee M&A integrations and cross-tenant migrations, including mailbox, Teams, SharePoint, and identity consolidation.
• Configure and manage multi-tenant organization (MTO) settings, such as cross-tenant synchronization, shared address books, and calendar federation.
• Administer email security and messaging infrastructure, ensuring compliance with industry standards and regulations.
• Manage Windows server operations, virtualization, and incident response, with a focus on automation and service improvement.
• Collaborate with internal application development teams to ensure optimal utilization of Power Platform services.
• Monitor and govern Power Platform database allocations, ensuring efficient resource utilization.
• Handle read-only and delegated access requests to Azure and M365 resources, maintaining a secure and controlled environment.
• Provide technical ownership and expertise during M&A activities, ensuring a smooth transition and integration of acquired entities.

• 5+ years of experience in a Microsoft 365 / enterprise systems engineering role, preferably in a large, complex organization.
• Proven hands-on experience with M365 cross-tenant migrations and integrations, including mailbox, Teams, and SharePoint migrations.
• Deep understanding of multi-tenant organization (MTO) architecture and cross-tenant access policies.
• Strong Entra ID / Azure AD skills, including app registrations, conditional access, and guest identity management.
• Experience with Power Platform administration, including environment management and service principal governance.
• Familiarity with email security standards (DMARC, SPF, DKIM) and enforcement tooling.
• ITSM experience, including change management, CHR procedures, and incident management.
• Excellent communication skills, both written and verbal, with the ability to collaborate effectively with stakeholders.
• Enthusiasm for AI tooling and automation, with a willingness to explore and implement AI-powered solutions for infrastructure and M365 operations.
• Knowledge of financial services regulatory and compliance requirements is an asset.

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