Senior Microsoft 365 & Enterprise Messaging Engineer

Oracle Corporation; Dublin; On-site; EUR 90,000 - 125,000; Full time

Job summary

Oracle Corporation is seeking a senior Microsoft 365 Engineer to join our Enterprise Collaboration Services team. You’ll own and optimize Microsoft 365, Exchange Online, Teams, SharePoint Online, OneDrive for Business, Entra ID, and Purview across Oracle’s global workforce.

You will troubleshoot production issues, implement DMARC/SPF/DKIM, manage Proofpoint, and automate tasks with PowerShell, collaborating with security, networking, and infrastructure teams to maintain reliability and security.

Qualifications

• 6+ years of hands-on experience administering Microsoft 365 in enterprise environments.
• Experience with Exchange Online and enterprise messaging architecture.
• Extensive experience with Proofpoint in enterprise environments.

Responsibilities

• Administer, maintain, and optimize Microsoft 365 services (Exchange Online, Teams, SharePoint Online, OneDrive, Entra ID, Purview).
• Manage enterprise messaging infrastructure, including mail flow, routing, transport rules, and email security.

Skills

Microsoft 365

Exchange Online

PowerShell

Azure Active Directory / Entra ID

Email security

DMARC SPF DKIM

MFA / SSO

On-call rotation

Tools

Proofpoint

Azure AD

Job description

Oracle Corporation is seeking a senior Microsoft 365 Engineer to join our Enterprise Collaboration Services team. You’ll own and optimize Microsoft 365, Exchange Online, Teams, SharePoint Online, OneDrive for Business, Entra ID, and Purview across Oracle’s global workforce.

You will troubleshoot production issues, implement DMARC/SPF/DKIM, manage Proofpoint, and automate tasks with PowerShell, collaborating with security, networking, and infrastructure teams to maintain reliability and security.