Senior Microsoft 365 Engineer

Job Summary

The Senior Microsoft 365 Engineer is responsible for engineering, administering, and supporting a secure, scalable, and reliable Microsoft 365 environment in a hybrid enterprise setting. This role designs, configures, and supports core Microsoft 365 services including Exchange Online, Teams, SharePoint Online, and OneDrive while ensuring alignment with business needs, security standards, compliance requirements, and operational best practices. This position is responsible for Microsoft 365 platform configuration, automation using PowerShell and Microsoft Graph, service health monitoring, security and compliance administration, and complex problem resolution. The role serves as the highest level of escalation for Microsoft 365 issues and partners closely with Infrastructure, Security, IAM, Networking, and operational teams to support collaboration, messaging, productivity, risk management, continuous improvement, and reliable service delivery across the organization.

Responsibilities

KEY RESPONSIBILITIES:

1. Own and engineer Microsoft 365 tenant services across Exchange Online, Teams, SharePoint, and OneDrive.
2. Design secure, scalable Microsoft 365 architecture aligned to business and technical needs.
3. Create and maintain mail flow, transport rules, and messaging security configurations.
4. Define and enforce governance for Teams, SharePoint sites, and OneDrive sharing.
5. Engineer and administer Microsoft Teams policies, configurations, and platform integrations in alignment with organizational standards and security requirements.
6. Lead migration of legacy file shares to SharePoint Online, ensuring adoption and governance.
7. Automate tenant operations using PowerShell and Microsoft Graph; reduce manual toil.
8. Serve as 4th level escalation for complex Microsoft 365 and messaging issues.
9. Maintain configuration baselines and standards; document changes and exceptions.
10. Align operations with ITIL processes for incident, problem, and change management.
11. Plan and execute changes through established governance and CAB processes.
12. Monitor service health, reliability, and capacity using Microsoft tools; respond to alerts.
13. Perform root cause analysis and drive permanent fixes for recurring issues.
14. Partner with IAM and Security teams on Conditional Access, MFA, and role design.
15. Track Microsoft 365 roadmap features; assess impact and plan releases.
16. Develop and maintain architecture diagrams, runbooks, SOPs, and knowledge articles.
17. Participate in emergency on call rotation and support major incident response.
18. Support license management and optimize platform usage and costs.
19. Contribute to SLA definition and meet operational and compliance commitments.