Senior M365 Administrator; Microsoft Office

Senior M365 Administrator (Microsoft Office 365)

Bellevue, WA (Hybrid);
Durham, NC (Hybrid);
Emeryville, CA (Hybrid)

We are seeking a highly skilled Collaboration Administrator with expertise in Microsoft 365 (M365), SharePoint, Exchange Online, Teams, and Slack to join the Identity and Collaboration team  ideal candidate will be a self‑directed problem‑solver who thrives in a fast‑moving environment, adapts to shifting priorities, and drives work forward independently.

This position follows the Company’s hybrid schedule which currently requires employees to work in the office at one of the following locations a minimum of three days per week:
Bellevue, WA;
Durham, NC; or Emeryville, CA.

• Administration and management of M365, Entra, SharePoint, Slack, Exchange Online, Teams
• Lead or participate in projects related to collaboration tools, identity, and M365
• Provide technical support and guidance to end‑users, resolving complex issues related to M365, Identity, and Slack
• Manage permissions and access controls across platforms to ensure security and compliance
• Manage and secure Enterprise Apps and App Registrations
• Maintain comprehensive documentation of system configurations, processes, and procedures
• Develop and deliver training to educate the larger IT team or employees on the effective use of collaboration tools
• Stay informed of upcoming changes that Microsoft is releasing to the M365 stack and take proactive action when needed
• Work closely with other IT teams, business units, and stakeholders to ensure alignment of collaboration solutions with business objectives
• Partner with vendors and service providers as needed, ensuring timely support and resolution of issues
• Effectively communicate technical concepts and solutions to non‑technical stakeholders, fostering a collaborative and productive working environment
• Participate in incident response efforts related to collaboration systems, including investigation, mitigation, and reporting of security incidents

• Education
  • Bachelor’s Degree in Computer Science, IT, or other relevant degree or equivalent work experience
• Required Experience
  • 5 years of experience with Microsoft 365 with at least 2 years in designing, implementing, and managing Entra and collaboration solutions
  • Expertise in Entra and Microsoft 365 (M365) administration and configuration
  • Configuration of Enterprise Applications, App Registration, SSO, and provisioning
  • Experience using Graph API
  • Power Shell for automation and administration
  • Proficiency in Active Directory, Entra , and IAM principles
  • In‑depth knowledge of SharePoint architecture, customization, and administration
  • Comprehensive understanding of Microsoft Teams management and troubleshooting
  • Proficiency in Exchange Online administration
  • Understanding of email authentication and security best practices
  • Familiarity with MS Purview and MS Defender
  • Prior involvement with CAB/Change Management
• Preferred Experience
  • Experience with Slack administration and integrations
  • Hands‑on experience with Power Automate
  • Experience with Azure Automation
  • Understanding of Copilot integrations within M365 ecosystem
  • Prior experience in a similar role within a rapid‑growth enterprise
  • Project management experience using tools like Jira
  • Familiarity with FedRAMP/NIST/CMMC Compliance
  • Notion Administration
  • Knowledge of mobile device management (MDM) and mobile application management (MAM) via Intune

The annual base salary range for this full‑time position is $70,000 to $140,000. This range is an estimate for what Tanium will pay a new hire. The actual annual base salary offered may be adjusted based on a variety of factors, including but not limited to, location, education, skills, training, and experience.

In addition to an annual base salary, team members will receive equity awards and a generous benefits package consisting of medical, dental and vision plan, family planning benefits, health savings account, flexible spending account, transportation savings account, 401(k) retirement savings plan with company match, life, accident and disability coverage, business travel accident insurance, employee assistance programs, disability insurance, and other well‑being benefits.

Tanium is an Equal Opportunity and Affidavit Pursuant to EEO statements. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, gender identity, sexual orientation, disability, protected Veteran status, or other legally protected categories. If you require a reasonable accommodation in searching for a job opening, completing an application, interviewing, or completing any pre‑employment testing or requirements, please contact  For more information refer to the “Know Your Rights” poster which is available at https://(Use the "Apply for this Job" box below)..