Senior Email Security Migration Engineer

Role Overview

We are seeking a senior email security specialist to support the migration of enterprise email protection from Proofpoint to Microsoft Defender for Office 365 and Exchange Online Protection (EOP).

This is a hands-on technical role responsible for assessing the current Proofpoint deployment, designing the Microsoft security configuration, and executing a controlled migration.

The candidate will work closely with security and messaging teams to ensure a secure and stable transition with minimal disruption to mail flow.

The candidate will support an active migration project and will be expected to contribute immediately to architecture validation, migration execution, and troubleshooting.

Local candidates only. (Hybrid Onsite)

Key Responsibilities

• Assess the current Proofpoint email security deployment, policies, and mail flow architecture
• Design the target configuration using Microsoft Defender for Office 365 and Exchange Online Protection
• Plan and execute the migration from Proofpoint to Microsoft Defender
• Redesign and validate inbound and outbound mail flow during migration
• Plan and support MX cutover and mail flow transition from Proofpoint to Microsoft EOP
• Configure and tune Microsoft email security policies including:
  • Anti-spam and anti-malware protection
  • Anti-phishing and impersonation protection
  • Safe Links and Safe Attachments
  • URL protection and attachment scanning
• Configure and validate mail flow connectors and routing between Proofpoint, Exchange Online, and external systems
• Implement SPF, DKIM, and DMARC authentication
• Configure transport rules, quarantine management, and threat policies
• Support pilot rollout, validation testing, and production cutover
• Troubleshoot mail delivery issues, false positives, and security policy conflicts during migration
• Validate protection against phishing, malware, and impersonation attacks
• Document final architecture, security policies, and operational procedures

Required Experience

• 7+ years’ experience in email security, messaging security, or Microsoft 365 security
• Strong experience with Proofpoint Email Security
• Strong experience with Microsoft Defender for Office 365 and Exchange Online Protection
• Must have led or executed at least one migration from Proofpoint (or another secure email gateway) to Microsoft Defender for Office 365
• Must have hands-on experience designing and implementing mail flow cutover from a secure email gateway to Exchange Online Protection / Microsoft Defender for Office 365
• Experience working in enterprise Microsoft 365 environments
• Understanding of Defence in Depth and Zero Trust Framework

Technical Skills

• Microsoft Defender for Office 365 (Plan 1 / Plan 2), Exchange Online Protection (EOP)
• SMTP mail flow, connectors, and secure email gateway routing
• Exchange Online mail flow, connectors and transport rules
• Anti-phishing and impersonation protection
• Email threat analysis and troubleshooting
• SPF, DKIM, DMARC implementation