About MailMigrationSupport LLC

MailMigrationSupport LLC is a Delaware-based IT consultancy headquartered in Edison, New Jersey, specializing in Microsoft 365 migrations, email security implementations, and enterprise infrastructure modernization. We deliver technical services to clients ranging from municipal governments and healthcare organizations to international airports and financial institutions, primarily through CDW Government contracts and direct engagements.

Our team has earned a reputation for tackling complex, high-stakes environments — including legacy SBS infrastructures, multi-tenant migrations, and mission-critical email security transitions — with precision and minimal disruption. We are growing and looking for an experienced Microsoft 365 Migration Engineer who thrives in dynamic, client-facing technical delivery.

Role Summary

The Microsoft 365 Migration Engineer will serve as the primary hands-on technical resource for end-to-end migrations to the Microsoft 365 ecosystem. While email migration is a core component, this role covers the full suite of M365 services, including Teams and SharePoint Online.

You will lead transitions from diverse source environments—including On-Premises Exchange (2010–2019/SBS), Tenant-to-Tenant (M365), Google Workspace (GWS), and File Servers/Hosted SharePoint—ensuring a seamless transition of mail, collaboration data, and document repositories.

Position Details

Feature	Details
Job Title	Microsoft 365 Migration Engineer
Department	Delivery / Professional Services
Reports To	Senior Consulting Engineer / Principal Consultant
Employment Type	Full-Time or Contract (W2 or 1099 considered)
Location	Remote with occasional on-site (Edison, NJ HQ; client sites as needed)
Travel	Up to 20% — client sites, project kickoffs, and go-live support
Citizenship
Clearance	Ability to pass background check required; government clearance a plus

Core Responsibilities

Full-Stack M365 Migration Delivery

Messaging: Execute migrations from Exchange (2010–2019/SBS), Google Workspace, and Hosted Exchange to M365. Manage Hybrid (HCW) setups, Public Folder transitions, and large mailbox archiving strategies.
SharePoint & OneDrive: Lead the migration of legacy file shares (NTFS) and on-premises SharePoint sites to SharePoint Online and OneDrive for Business using SharePoint Migration Tool (SPMT) or ShareGate.
Microsoft Teams: Design and execute Teams migrations (Tenant-to-Tenant), including Channels, Chats, Tabs, and associated SharePoint site structures.
Tenant-to-Tenant: Handle complex M365-to-M365 migrations involving domain moves, identity re-mapping, and cross-tenant data synchronization.
Tooling: Proficiency in Quest Migrator, BitTitan MigrationWiz, ShareGate, and native Microsoft migration engines.

Email Security & Identity Integration

Configure Microsoft Entra Connect for hybrid identity synchronization.
Reconfigure and validate Mimecast, Proofpoint, or Barracuda gateways, ensuring inbound/outbound mail routing and security policies remain intact post-migration.
Identify and remediate SMTP relay dependencies for printers, scanners, and LOB applications.

Pre-Assessment & Documentation

Run discovery scripts to produce inventory reports for mailboxes, SharePoint site structures, and Teams configurations.
Author As-Built documentation, DNS cutover runbooks, and project closeout packages.
Support pre-sales by scoping Statements of Work (SOWs) and participating in technical discovery calls.

Required Qualifications & Skills

Must-Have Technical Skills:

M365 / Exchange Online • SharePoint Online Migration • Microsoft Teams Administration • Exchange Hybrid (HCW) • Tenant-to-Tenant Migrations • Google Workspace to M365 • Microsoft Entra Connect • DNS (MX/SPF/DKIM/DMARC) • PowerShell • Mimecast, Proofpoint, or Barracuda • ShareGate / BitTitan / Quest

Experience: 3+ years of hands-on migration delivery across Email, SharePoint, and Teams.
Legacy Knowledge: Proven ability to navigate SBS (Small Business Server) and legacy file server permissions/structures.
Scripting: Strong PowerShell skills for environment discovery and bulk data manipulation.
Security Gateways: Hands-on experience reconfiguring Mimecast, Proofpoint, or Barracuda in a migration context.

Preferred Qualifications:

Certifications: MS-203 (Messaging), MS-700 (Teams), or MS-102 (Administrator Expert).
Modern Integration: Familiarity with ChatGPT / Microsoft Copilot integration within the M365 suite.
Compliance: Experience working with government (CJIS/FedRAMP) or healthcare (HIPAA) compliance requirements.

How to Apply

Interested candidates should submit the following

Resume highlighting specific experience with Email, SharePoint, and Teams migrations.
Brief cover note describing a project where you migrated both messaging and document repositories.
List of active Microsoft certifications.
Confirmation of Residency Status ().

Subject Line: M365 Migration Engineer (Full-Stack) — [Your Name]

Microsoft 365 Migration Engineer

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