Senior Microsoft 365 Platform Architect – IAM & Security

Repligen

Waltham (MA)

On-site

USD 140,000 - 180,000

Full time

7 days ago

Be an early applicant

A complete application in a minute

Tailored resume and cover letter, ready to send.

Get past ATS filters

Benefits offered by this job

Bonus program

Equity potential

Comprehensive benefits

Job summary

Repligen seeks a Senior Microsoft 365 Platform Engineer to lead the engineering, governance, security, and continuous improvement of the global M365 platform. You will serve as the technical lead for Microsoft 365 collaboration, SharePoint Online, IAM/Entra ID, and endpoint management services, ensuring secure, scalable digital workplace solutions across the enterprise.

You will own administration, governance, and optimization of M365 services, guide Tier 3 escalation, and collaborate with

Qualifications

Bachelor's degree or equivalent experience in IT/CS.
7+ years of hands‑on Microsoft 365 admin/engineering in a large enterprise.
Deep expertise in M365 admin, SharePoint Online governance, Teams, Exchange, OneDrive, Entra ID, IAM, and Intune.
Strong PowerShell scripting and Microsoft Graph automation experience.
Experience with Hybrid AD and Entra ID environments; SSO, MFA, CA, PIM, and Identity Governance.
Experience supporting global organizations and ITIL processes.

Responsibilities

Own admin, governance, and continuous improvement of the Microsoft 365 platform.
Lead Tier 3 escalation and technical authority for M365 platform issues.
Design and implement secure, scalable M365 solutions aligned with security standards.
Lead SharePoint governance, permissions, site lifecycle, and migration initiatives.
Manage IAM capabilities including Hybrid Identity, SSO, MFA, CA, PIM, Identity Governance.
Support enterprise app integrations using SAML, OAuth, OpenID Connect, SCIM.
Administer Intune and Windows Autopilot for device provisioning and compliance.
Develop automation using PowerShell and Microsoft Graph; monitor health and security.
Collaborate with Cybersecurity to implement M365 security and compliance controls.
Contribute to incident response, root cause analysis, and service improvements.
Create architecture docs, runbooks, and operational procedures.