Senior Microsoft 365 Platform Lead — IAM, Security & Governance

Repligen Corporation; Pennsylvania; On-site; USD 140,000 - 180,000; Full time

Job summary

Repligen Corporation seeks a Senior Microsoft 365 Platform Engineer to lead the engineering, administration, governance, security, and continuous improvement of our global Microsoft 365 platform.

This role will serve as the technical lead for Microsoft 365 collaboration, IAM/Entra ID, and endpoint management services, ensuring secure, scalable, and reliable digital workplace solutions across the enterprise.

Qualifications

• Bachelor's degree in IT, CS, or related field or equivalent experience.
• 7+ years hands-on Microsoft 365 administration and engineering in a medium-to-large enterprise.
• Deep expertise in Microsoft 365 Administration, SharePoint Online Administration & Governance, Teams, Exchange Online, OneDrive for Business, Entra ID, IAM, and Intune.
• Strong experience with Hybrid Active Directory and Entra ID environments.
• Experience implementing SSO, MFA, Conditional Access, RBAC, PIM, and Identity Governance.
• Strong PowerShell scripting and Microsoft Graph automation.
• Experience supporting endpoint management, Windows Autopilot, and modern device management.
• Understanding of Microsoft 365 security, compliance, governance, and collaboration technologies.
• Experience with Defender, Purview, ServiceNow, and ITIL processes preferred.
• Experience supporting global organizations and geographically distributed teams.

Responsibilities

• Own the administration, governance, and continuous improvement of Microsoft 365 services including SharePoint Online, Teams, Exchange Online, OneDrive, Entra ID, and Intune.
• Serve as Tier 3 escalation point and technical authority for Microsoft 365 platform issues.
• Design and implement secure, scalable M365 solutions aligned with enterprise architecture and security standards.
• Lead SharePoint governance, permissions management, site lifecycle, and migration initiatives.
• Administer IAM capabilities including Hybrid Identity, SSO, MFA, CA, RBAC, PIM, and Identity Governance.
• Support enterprise application integrations using SAML, OAuth, OpenID Connect, and SCIM.
• Develop automation using PowerShell and Microsoft Graph.
• Monitor platform health, performance, security posture, adoption, and compliance metrics.
• Partner with Cybersecurity teams to implement M365 security, compliance, and governance controls.
• Participate in incident response, root cause analysis, and continuous service improvement.
• Create and maintain architecture documentation, runbooks, and operational procedures.
• Evaluate roadmap enhancements and lead adoption of new technologies.

Skills

Microsoft 365 Administration

SharePoint Online Administration

Microsoft Teams

Exchange Online

OneDrive for Business

Microsoft Entra ID

IAM

Microsoft Intune

Hybrid Active Directory

SSO

MFA

Conditional Access

RBAC

PIM

Identity Governance

PowerShell

Microsoft Graph

Windows Autopilot

Endpoint Management

Microsoft Defender

Purview

ITIL

Education

Bachelor's degree in Information Technology or related field

Tools

PowerShell

Microsoft Graph

Job description

Repligen Corporation seeks a Senior Microsoft 365 Platform Engineer to lead the engineering, administration, governance, security, and continuous improvement of our global Microsoft 365 platform.

This role will serve as the technical lead for Microsoft 365 collaboration, IAM/Entra ID, and endpoint management services, ensuring secure, scalable, and reliable digital workplace solutions across the enterprise.