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Robert Half is searching for an Exchange Online Engineer to support a Tax and Assurance client based in Seattle, WA. This role will focus on designing and managing Exchange Online infrastructure, executing complex email migrations, and ensuring stable and secure mail flow across the organization.
Job Responsibility:
Design, implement, and maintain Exchange Online tenant-level architecture within Microsoft 365
Configure and manage mail flow, connectors, and hybrid Exchange environments
Administer shared mailboxes, distribution lists, and Microsoft 365 Groups
Ensure proper configuration and optimization of messaging infrastructure across the tenant
Lead and support large-scale Exchange Online tenant migrations and consolidations
Manage cross-tenant mail flow coexistence during migration phases
Plan and execute cutover and phased migration strategies with minimal business disruption
Coordinate with infrastructure, identity, and messaging teams during migration efforts
Troubleshoot and resolve complex mail flow and messaging delivery issues
Perform post-migration cleanup, system optimization, and environment standardization
Support high-volume enterprise messaging environments with a focus on reliability and performance
Implement best practices for monitoring, governance, and ongoing maintenance
Requirements:
3–5+ years of experience working within an enterprise email or messaging environment
Deep expertise with Microsoft Exchange Online and Microsoft 365 messaging services
Hands-on experience implementing and managing Secure Email Gateways, such as: Proofpoint, Mimecast, Barracuda
Strong PowerShell scripting skills for automation, administration, and reporting