L3 Microsoft O365 Engineer

Role Overview

We are seeking a highly skilled L3 Microsoft 365 Engineer with deep expertise across the entire Microsoft 365 ecosystem. This senior role is a critical escalation point for complex issues, driving the resolution of major incidents and ensuring the seamless operation, security, and productivity of our enterprise.

The ideal candidate is a subject matter expert in Exchange Online, Teams, SharePoint, OneDrive, and Azure Active Directory. You should have extensive hands-on experience troubleshooting and administering hybrid environments and be comfortable leading high-stakes situations to ensure business continuity.

Key Responsibilities

• Serve as the L3 escalation point for all Microsoft 365-related incidents and requests, providing expert-level support.
• Administer and troubleshoot core services, including:
  • Exchange Online: Manage mail flow, transport rules, and hybrid mail routing.
  • Microsoft Teams: Provide advanced support for voice integration, policies, and collaboration features.
  • SharePoint Online & OneDrive: Oversee permissions, data governance, and migrations.
  • Azure AD (Entra ID): Administer conditional access, SSO, MFA, and role-based access control.
• Lead the resolution of P1/MIM incidents related to Microsoft 365 services, ensuring rapid service restoration.
• Implement and manage security and compliance policies (DLP, retention, eDiscovery, auditing).
• Manage hybrid environments and synchronization with on-premises Active Directory (AD Connect, ADFS).
• Perform root cause analysis (RCA) and document findings to prevent future issues.
• Develop and maintain documentation and runbooks to empower L1/L2 support teams.
• Collaborate with cross-functional teams on new feature rollouts, migrations, and upgrades.

Required Skills & Experience:

• 8+ years of experience in Microsoft infrastructure, with a minimum of 5 years focused on Microsoft 365.
• Expert-level knowledge of Exchange Online, Microsoft Teams, SharePoint Online, OneDrive, and Azure AD.
• Strong proficiency in PowerShell scripting for administration, troubleshooting, and automation.
• Proven experience with Microsoft 365 Security & Compliance Center.
• Demonstrated ability to lead high-severity incident resolution under pressure.
• Solid understanding of ITIL processes (Incident, Problem, Change Management).
• Excellent communication and documentation skills.

Preferred Qualifications:

• Microsoft certifications (e.g., MS-100, MS-101, MS-700, MS-740).
• Experience with third-party migration tools (e.g., Quest, BitTitan).
• Familiarity with endpoint management platforms like Intune / Endpoint Manager.
• Exposure to enterprise monitoring tools.

What We Offer

• The opportunity to work with an enterprise-scale Microsoft 365 environment.
• A collaborative and challenging work environment.
• Competitive salary and comprehensive benefits.
• Opportunities for continuous learning, professional development, and career advancement.