Senior Microsoft 365 Platform Engineer: IAM & Security Lead

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

Job summary

Repligen Corporation is seeking a Senior Microsoft 365 Platform Engineer to lead the engineering, governance, security, and continuous improvement of our global Microsoft 365 platform. You will serve as the technical lead for M365 collaboration, IAM, Entra ID, and endpoint management, delivering secure, scalable digital workplace solutions.

The role requires 7+ years of hands-on MS 365 admin/engineering in large enterprises, with strong IAM, SSO/MFA, and PowerShell automation skills.

Qualifications

• 7+ years of hands‑on Microsoft 365 administration and engineering experience in a medium‑to‑large enterprise.
• Bachelor's degree in Information Technology, Computer Science, or related field, or equivalent experience.
• Strong experience with Hybrid Active Directory and Entra ID environments.
• Experience implementing and managing SSO, MFA, Conditional Access, RBAC, PIM, and Identity Governance.

Responsibilities

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

Skills

Microsoft 365 Admin

SharePoint Online Admin

Microsoft Teams

Exchange Online

OneDrive for Business

Microsoft Entra ID

IAM

Hybrid AD

SSO/MFA

RBAC/PIM

PowerShell

Microsoft Graph

Intune

Endpoint management

Windows Autopilot

Security & Compliance

Defender/Purview

ITIL

ServiceNow

Education

Bachelor's degree in IT/CS

Tools

Microsoft Graph

Job description

Repligen Corporation is seeking a Senior Microsoft 365 Platform Engineer to lead the engineering, governance, security, and continuous improvement of our global Microsoft 365 platform. You will serve as the technical lead for M365 collaboration, IAM, Entra ID, and endpoint management, delivering secure, scalable digital workplace solutions.

The role requires 7+ years of hands-on MS 365 admin/engineering in large enterprises, with strong IAM, SSO/MFA, and PowerShell automation skills.