M365 Collaboration Architect

Required Skills & Experience

• 8+ years of Microsoft 365 experience.
• Demonstrated architecture ownership for cross-tenant M365 migrations into large production tenants.
• Deep Exchange experience, including Exchange hybrid and mail routing.
• Hands-on Quest On Demand Migration experience.
• Strong understanding of Microsoft Purview.
• Strong PowerShell skills.
• Microsoft Graph experience.
• Experience with Teams, SharePoint, OneDrive, and tenant coexistence.
• Ability to develop and execute migration-wave and cutover strategies.
• Ability to own the domain end to end while managing a small technical team

Nice to Have Skills & Experience

• Previous M&A integration experience.
• Teams telephony migration experience.
• ShareGate, BitTitan, and/or AvePoint experience.
• Microsoft Enterprise Administrator Expert certification.
• Experience in construction, energy, utilities, or other field-heavy industries.

Job Description

Senior hands-on M365 Collaboration Architect responsible for moving acquired organizations into a large parent Microsoft 365 environment. The consultant will own coexistence, Exchange/mail routing, migration strategy, M365 workloads, automation, and production cutovers while leading a small engineering team.

• Own the Microsoft 365 collaboration workstream for acquired-company integrations from discovery through final cutover.
• Assess existing Exchange/mail-routing configurations, tenant policies, Teams, SharePoint, OneDrive, file shares, and data volumes.
• Design cross-tenant mail routing, coexistence, and migration-wave strategies.
• Establish coexistence using B2B, cross-tenant synchronization, free/busy, and Teams federation.
• Lead Exchange, Teams, SharePoint, and OneDrive migrations into the parent production tenant.
• Assess how parent retention, DLP, eDiscovery, and other Purview policies affect migrated users and content.
• Analyze dependencies involving identity, networking, line-of-business applications, and shared mailboxes.
• Use Quest On Demand Migration for hands-on migration execution.
• Develop PowerShell and Microsoft Graph automation.
• Define migration sequencing, rollback, risk, and go/no-go criteria.
• Participate directly in production cutovers.
• Lead 2-3 engineers and coordinate across identity, network, security, compliance, and application teams.