Email Security Administrator - Mimecast to Proofpoint
Job Description
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Help deliver a secure, seamless email security migration. You’ll assess existing Mimecast configurations, map policies into Proofpoint, and support testing, cutover, and post-migration operations.
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Responsibilities
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- Assess Mimecast policies, profiles, exceptions, and mail flow; document the current environment.
- Map inbound and outbound policies, anti-spoofing, attachment and URL protection, impersonation defense, and allow/block lists into Proofpoint.
- Configure and validate Exchange Online connectors, transport rules, and Proofpoint archiving prerequisites, including security groups, app registrations, journal rules, and Entra ID synchronization.
- Test mail flow and policies across both platforms; analyze message traces and resolve issues.
- Support MX cutover, rollback planning, monitoring, hypercare, and knowledge transfer.
- Prepare operational handover documentation and recommendations.
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Required Skills
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- Hands-on Mimecast administration and policy management, including Mimecast-to-Proofpoint email gateway migrations.
- Exchange Online administration, mail flow troubleshooting, and message trace analysis.
- Microsoft Entra ID administration and synchronization prerequisites.
- Email security architecture and SPF, DKIM, DMARC, anti-spoofing, and impersonation protection.
- Formal testing, cutover planning, and hypercare experience.
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Nice to Have
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- Experience setting up Proofpoint archiving prerequisites, including journal rules and Entra ID app registrations.
- Experience preparing operational runbooks and rollback plans.
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