Senior M365 Administrator (Microsoft Office 365)

We are seeking a highly skilled Collaboration Administrator with expertise in Microsoft 365, SharePoint, Exchange Online, Teams, and Slack to join Tanium’s Identity and Collaboration team. The ideal candidate is a self‑directed problem‑solver who thrives in a fast‑moving environment, adapts to shifting priorities, and drives work forward independently. What You’ll Do Administration and management of M365, Entra, SharePoint, Slack, Exchange Online, and 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 effective use of collaboration tools. Stay informed of upcoming Microsoft releases to the M365 stack and take proactive action when needed. Work closely with other IT teams, business units, and stakeholders to align 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 to foster collaboration and productivity. Participate in incident response efforts related to collaboration systems, including investigation, mitigation, and reporting of security incidents. We’re looking for someone with Education Bachelor’s Degree in Computer Science, IT, or a related field, or equivalent work experience. Required Experience 5 years of experience with Microsoft 365, with at least 2 years designing, implementing, and managing Entra and collaboration solutions. Expertise in Entra and Microsoft 365 administration and configuration. Configuration of Enterprise Applications, App Registration, SSO, and provisioning. Experience using Graph API. PowerShell for automation and administration. Proficiency in Active Directory, Entra ID, 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 Microsoft Purview and Microsoft Defender. Prior involvement with CAB/Change Management. Preferred Experience Experience with Slack administration and integrations. Hands‑on experience with PowerAutomate. Experience with Azure Automation. Understanding of Copilot integrations within the M365 ecosystem. Prior experience in a similar role within a rapid‑growth enterprise. Project management experience using tools such as Jira. Familiarity with FedRAMP, NIST, and CMMC compliance. Notion administration. Knowledge of mobile device management (MDM) and mobile application management (MAM) via Intune. Benefits The annual base salary range for this full‑time position is $70,000 to $140,000. In addition to base pay, team members receive equity awards and a comprehensive benefits package, including medical, dental, vision, family planning, health savings account, flexible spending account, transportation savings account, 401(k) with company match, life, accident and disability coverage, business travel accident insurance, employee assistance programs, and other well‑being benefits. Tanium is an Equal Opportunity and affirmative action employer. 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 View email address on click.appcast.io. For more information refer to the “Know Your Rights” poster available here – Please be aware of job offers coming from people claiming to be Tanium employees. Tanium employees will only use @tanium.com email addresses to communicate with you, will have video interviews with you, and will never ask you for money. For more information on how Tanium processes your personal data, please see our Privacy Policy. #J-18808-Ljbffr Tanium