Senior Microsoft 365 Platform Engineer

Suffolk Construction • Boston, MA

76d

About The Position

The Senior Microsoft 365 Platform Engineer is the operational and engineering core of Suffolk's Microsoft ecosystem. This role manages tenant-wide services, implements the Architect's designs and standards, and drives automation-first operations. The Engineer ensures reliability, security, and user experience across Exchange Online, Teams, SharePoint/OneDrive, Entra ID, Intune, Defender, and Power Platform, handling Tier 2/3 escalations and leading deployments and changes.

Requirements

• 5+ years administering Microsoft 365 at enterprise scale (≥1,000 users).
• Deep experience with Exchange Online, Teams, SharePoint/OneDrive, Entra ID, Intune, and Defender.
• Strong PowerShell and Graph API skills for automation and reporting.
• Proven delivery of tenant-wide changes, migrations, and complex incident/problem resolution.
• Practical knowledge of Purview features (retention, DLP, eDiscovery) and security baselines.

Nice To Haves

• Microsoft Certified: Enterprise Administrator Expert and/or Messaging/Teams/Endpoint Administrator.
• Experience with Power Platform administration and CI/CD/ALM patterns.
• Experience in environments with regulatory or contractual compliance requirements.

Responsibilities

• Administer, configure, and maintain Microsoft 365 workloads across Exchange Online, Teams, SharePoint Online/OneDrive.
• Manage Entra ID objects, Conditional Access, MFA, identity lifecycle, and directory hygiene.
• Operate Intune for device onboarding, compliance policies, app packaging/deployment, and security baselines.
• Handle Tier 2/3 incidents/problems; manage change control, maintenance windows, and service communications.
• Implement reference designs and standards defined by the Architect; deliver repeatable, supportable configurations.
• Build and maintain PowerShell and Graph automations for provisioning, reporting, remediation, and license hygiene.
• Lead feature deployments and migrations; coordinate pilots, adoption guides, and rollout plans.
• Enforce DLP, retention, sensitivity labels, Conditional Access, and Defender controls according to policy.
• Maintain audit/compliance reporting; support assessments, investigations, and remediation activities.
• Administer environments, connectors, and DLP policies; support solution ALM and pipelines per CoE standards.
• Provide enablement to citizen developers within guardrails; review connectors and data access.
• Provision Teams/SharePoint sites, implement IA/metadata/search patterns, and support content lifecycle.
• Assist with migrations from legacy file services/SharePoint to SharePoint Online.
• Provide telemetry and usage insights for capacity planning and license optimization.
• Engage Microsoft Premier/Unified Support for technical escalations and proactive services.

What This Job Offers

• Industry: Construction of Buildings