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Senior M365 Engineer

Unify Group
1 day ago
Full-time
On-site
Abu Dhabi, Abu Dhabi Emirate, United Arab Emirates

Responsibilities:

  • Exchange Online, email security and delivery

  • Manage Exchange Online, including hybrid Exchange, mail flow, connectors and migrations.

  • Configure email security: SPF, DKIM, DMARC, Defender for Office 365 and anti-phishing policies.

  • Own resolution of email delivery issues: bounces and NDRs, delayed or missing mail, messages wrongly sent to junk or quarantine, and inbound/outbound blocking.

  • Investigate with message trace, message headers, quarantine and Exchange admin center reports.

  • Monitor sender reputation and handle blocklist delisting (e.g. Microsoft, Spamhaus) and third-party mail gateway or relay issues.

  • Manage DNS records for mail (MX, SPF, DKIM, DMARC, Autodiscover) and review DMARC reports to prevent spoofing and delivery failures.

  • Teams, SharePoint and OneDrive

  • Administer Teams, including policies, governance, Teams Phone and meeting rooms.

  • Design SharePoint Online and OneDrive structure, permissions, sharing and lifecycle policies.

  • Security policies, identity and compliance

  • Design, implement and maintain Microsoft 365 security policies aligned to Microsoft and CIS security baselines.

  • Configure Defender for Office 365 policies: Safe Links, Safe Attachments, anti-phishing, anti-spam and anti-malware.

  • Enforce Conditional Access policies: MFA for all users, blocking legacy authentication, and location and device-compliance rules.

  • Set external sharing, guest access and Teams/SharePoint security policies.

  • Configure audit logging, alert policies and app protection policies for Outlook and Teams on mobile devices.

  • Administer Entra ID: hybrid identity (Entra Connect), Conditional Access, MFA and PIM.

  • Implement Microsoft Purview: data loss prevention, sensitivity labels, retention and eDiscovery.

  • Monitor and improve Microsoft Secure Score and respond to security alerts.

  • Operations

  • Automate administration and reporting with PowerShell and Microsoft Graph.

  • Manage licences, service health, change management and vendor support cases.

  • Keep documentation, runbooks and user guidance up to date.

Required qualifications

  • 7+ years in Microsoft infrastructure, including 5+ years administering Microsoft 365 at enterprise scale (1,000+ users).

  • Proven experience leading Exchange and tenant-to-tenant migrations.

  • Deep knowledge of Exchange Online, Teams, SharePoint Online and OneDrive.

  • Strong Entra ID, Conditional Access and hybrid identity experience.

  • Hands-on experience with Purview compliance and Defender for Office 365.

  • Strong PowerShell skills, including Microsoft Graph.

  • Experience leading projects, mentoring engineers and working with senior stakeholders.

  • Proven track record troubleshooting complex email delivery issues using message trace, headers, NDR codes and DNS mail records.

  • Hands-on experience designing and implementing Microsoft 365 security policies (Defender for Office 365, Conditional Access, sharing and audit policies) in an enterprise tenant.

Preferred qualifications

Area/Certification

Microsoft 365 /MS-102 Microsoft 365 Administrator Expert

Teams/MS-700 Teams Administrator

Identity/ SC-300 Identity and Access Administrator

Security / compliance / SC-401 Information Security Administrator, or SC-200