Principal Microsoft 365 Engineer - Remote/Dublin

Oracle; Dublin; Remote; EUR 110,000 - 140,000; Full time

Job summary

Oracle Cloud Infrastructure (OCI) seeks a principal Microsoft 365 Engineer to join Enterprise Collaboration Services. You will own complex Microsoft 365 initiatives, troubleshoot production issues, and collaborate with global teams to ensure reliable and secure collaboration for Oracle’s large workforce.

You will administer 365 services, manage mail flow and security, and drive automation and security enhancements across the messaging platform.

Qualifications

• 6+ years hands-on experience administering Microsoft 365 in enterprise environments.
• Strong Exchange Online, enterprise messaging architecture, mail flow and troubleshooting.
• Extensive experience administering Proofpoint in enterprise environments, ideally 6+ years.
• Experience with email security and authentication technologies (DMARC, SPF, DKIM).
• Strong knowledge of Microsoft Entra ID (Azure AD), Active Directory and identity security.
• Experience supporting Teams, SharePoint Online, and OneDrive for Business.
• PowerShell experience and automation of Microsoft 365 admin processes.

Responsibilities

• Administer, maintain, and optimize Microsoft 365 services including Exchange Online, Teams, SharePoint Online, OneDrive, Entra ID, and Purview.
• Manage enterprise messaging infrastructure: mail flow, routing, transport rules, and email security.
• Administer and optimize Proofpoint email security solutions for secure messaging.
• Implement and maintain email authentication technologies (DMARC, SPF, DKIM).
• Troubleshoot complex issues across Microsoft 365, messaging, identity, and infrastructure.
• Support identity and access management technologies including Conditional Access, MFA, SSO, and PIM.
• Improve operational efficiency with PowerShell automation and AI-assisted tooling.
• Contribute to security, compliance, and governance using Defender for Office 365 and Purview.
• Independently drive technical projects and collaborate with distributed teams.
• Participate in on-call rotation for business-critical services.

Skills

Microsoft 365

Exchange Online

Proofpoint

PowerShell

Automation

Identity security

Active Directory

Azure AD

MFA

SSO

Teams

SharePoint Online

OneDrive

Tools

Microsoft Purview

Microsoft Defender for Office 365

ChatGPT

Codex

Job description

Oracle Cloud Infrastructure (OCI) seeks a principal Microsoft 365 Engineer to join Enterprise Collaboration Services. You will own complex Microsoft 365 initiatives, troubleshoot production issues, and collaborate with global teams to ensure reliable and secure collaboration for Oracle’s large workforce.

You will administer 365 services, manage mail flow and security, and drive automation and security enhancements across the messaging platform.