Senior Microsoft 365 Administrator

Wilson Sonsini is the premier legal advisor to technology, life sciences, and other growth enterprises worldwide. We represent companies at every stage of development, from entrepreneurial start‑ups to multibillion‑dollar global corporations, as well as the venture firms, private equity firms, and investment banks that finance and advise them. The firm has approximately 1,100 attorneys in 17 offices: 13 in the U.S., two in China, and two in Europe.

Our broad spectrum of practices and entrepreneurial spirit allow exceptional opportunities for professional achievement and career growth. Microsoft 365 is where our attorneys and staff do their work every day. As Senior Microsoft 365 Administrator, you’ll keep it secure, reliable, and evolving. You’ll lead the migration of key services into M365, keep our tenants aligned with firm security and risk standards, and partner with IT Operations, Security, Risk, Applications, and Communications to support attorneys, practice groups, and administrative teams.

This is a fully remote opportunity.

Essential Duties and Responsibilities:

• Email and security
• Administer Exchange Online
• Manage Mimecast policies and configuration (spam, malware, and other threats)
• Help manage the firm’s email archiving solution
• Identity and access
• Administer Entra  and group lifecycle, licensing, and device registration
• Manage and troubleshoot hybrid identity, including Entra Connect sync with on-premises Active Directory
• Manage enterprise apps, app registrations, and B2B guest access, and support periodic access reviews
• Mobile devices
• Support mobile devices on Air Watch and help move us to Intune
• Collaboration and conferencing
• Support Teams, SharePoint, and One Drive
• Work with Communications on AV conferencing equipment
• Security, compliance, and performance
• Support our Purview and Defender implementations alongside IT Security and Risk
• Run root cause analysis on cloud performance issues to restore service quickly and stop repeat problems
• Documentation and knowledge sharing
• Document the services you manage
• Stay current on M365 developments and share what you learn with IT engineers and developers

Education and/or Work Experience Requirements:

• 7+ years as a Microsoft 365 Administrator, or comparable experience
• Hands‑on administration of Exchange Online, Teams, SharePoint Online, Purview, Copilot, One Drive, and Intune
• 3+ years administering Entra  (formerly Azure AD), including hybrid identity with Entra Connect
• Working knowledge of Conditional Access, MFA, and SSO (SAML/OIDC)
• Experience with email security and mail gateway policy management
• Experience troubleshooting authentication and access issues across Exchange Online, Teams, One Drive, and Intune
• Understanding of M365 integrations using Graph API

Working Mentality

• You spot problems early and come with solutions
• You collaborate across IT and explain things clearly to both engineers and non‑technical audiences
• You keep multiple projects moving at once
• You handle confidential information with discretionf>
  
  You’re available for 24/7 support when critical issues arise

Preferred qualifications

• BA; experience in the legal industry
• Microsoft 365 certification (Administrator Expert, MS-102) or SC-300
• Experience migrating MDM platforms, such as Air Watch to Intune
• Power Shell or Graph automation for M365 and identity
• Entra  experience:
  Privileged Identity Management, access reviews, entitlement management Identity protection, risk‑based policies, and sign‑in log analysis
• Experience with AI tools such as Copilot or Claude
• Experience supporting AV and conferencing equipment

The primary location for this job posting is in Palo Alto, but other locations may be listed.

The actual base pay offered will depend upon a variety of factors, including but not limited to the…