Shape the Future with Dun & Bradstreet At Dun & Bradstreet, we believe data has the power to create a better tomorrow. As a global leader in business decisioning data and analytics, we help companies worldwide grow, manage risk, and innovate. For over 180 years, businesses have trusted us to turn uncertainty into opportunity. We’re a diverse, global team that values creativity, collaboration, and bold ideas. Are you ready to make an impact and help shape what’s next? Join us! Explore opportunities at dnb.com/careers. The Senior O365 Engineer is responsible for the design, administration, and support of Microsoft 365 services across the enterprise, with deep experience spanning the full Microsoft platform. This role delivers and maintains identity, security, and collaboration solutions including single sign-on (SSO) applications, app registrations, conditional access, Privileged Identity Management (PIM), Microsoft Purview, SharePoint, OneDrive, Teams, Microsoft 365 Groups, Exchange, and Microsoft 365 Copilot. Work includes configuring secure access controls, governing data and collaboration workloads, and automating administration through PowerShell and scripting. You will support service health, troubleshoot issues, and optimize performance across Microsoft 365 workloads while partnering with security, infrastructure, and business teams. Through strong platform stewardship and cross-platform expertise, the engineer contributes to a secure, well-governed, and highly available Microsoft 365 environment.  KEY RESPONSIBILITIES: Administer, support, and maintain Microsoft 365 services across the platform, including Exchange Online, SharePoint Online, OneDrive, Microsoft Teams, and Microsoft 365 Groups.  Configure and manage single sign-on (SSO) applications, app registrations, and enterprise application integrations in Microsoft Entra ID (Azure Active Directory).   Design, implement, and maintain conditional access policies to secure identity and enforce access controls across the environment.  Administer privileged access using Privileged Identity Management (PIM), including just-in-time activation of privileged roles, eligible role assignments, and periodic privileged-access reviews.   Apply data governance, security, and compliance controls using Microsoft Purview, including data classification, data loss prevention (DLP), and retention policies.   Develop and maintain PowerShell scripts to automate provisioning, administration, reporting, and routine operational tasks across Microsoft 365 workloads.   Develop and maintain PowerShell scripts to automate provisioning, administration, reporting, and routine operational tasks across Microsoft 365 workloads.   Administer SharePoint Online, OneDrive, and Microsoft Teams, including site collections, permissions, sharing and external-access policies, governance, and lifecycle management.   Support Exchange Online configuration, including mail flow, connectors, distribution groups, and messaging and compliance policies.   Manage Microsoft 365 Groups and identity lifecycle, including provisioning, membership, and periodic access reviews.  Monitor service health, troubleshoot issues, and optimize performance across Microsoft 365 and the broader Microsoft platform.  Support the deployment, configuration, governance, and adoption of Microsoft 365 Copilot, including licensing, data-access readiness, and security and compliance controls.  Collaborate with security, infrastructure, and business teams to align Microsoft 365 configurations with organizational, security, and end-user needs.  ESSENTIAL SKILLS NEEDED: * Experience across all Microsoft platforms, with hands-on administration of Microsoft 365 services (Exchange Online, SharePoint Online, OneDrive, Teams, and Microsoft 365 Groups). * Hands-on experience with single sign-on (SSO) applications, app registrations, and enterprise application integration in Microsoft Entra ID (Azure Active Directory). * Experience configuring and managing conditional access policies, Privileged Identity Management (PIM) roles, and identity and access controls. * Familiarity with Microsoft Purview governance features and related security and compliance controls, including data classification, data loss prevention (DLP), and retention. * Proficiency with PowerShell and scripting to automate administration, provisioning, and reporting across Microsoft 365. * Experience administering SharePoint Online, OneDrive, Microsoft Teams, Microsoft 365 Groups, and Exchange Online. * Familiarity with Microsoft 365 Copilot deployment, governance, licensing, and adoption, including data-access and security readiness. * Familiarity with Microsoft Intune for endpoint and device management is a plus (optional). * Ability to collaborate across technical functions and communicate clearly with partners. * Certifications such as MS-102 (Microsoft 365 Administrator) and SC-300 (Identity and Access Administrator) are preferred. Additional certifications including MS-700, SC-400, SC-900, AZ-104 and AZ-900 are beneficial. * Strong analytical and problem solving skills. * Experience with platform performance optimization and troubleshooting. * Show an ownership mindset in everything you do; be a problem solver, be curious and be inspired to take action, be proactive, seek ways to collaborate and connect with people and teams in support of driving success. * Continuous growth mindset, keep learning through social experiences and relationships with stakeholders, experts, colleagues and mentors as well as widen and broaden your competencies through structural courses and programs. * Where applicable, fluency in English and languages relevant to the working market. Benefits We Offer · Generous paid time off in your first year, increasing with tenure. · Up to 16 weeks 100% paid parental leave after one year of employment. · Paid sick time to care for yourself or family members.  · Education assistance and extensive training resources. · Do Good Program: Paid volunteer days & donation matching.   · Competitive 401k with company matching. · Health & wellness benefits, including discounted Wellhub membership rates. · Medical, dental & vision insurance for you, spouse/partner & dependents. All Dun & Bradstreet job postings can be found at https://jobs.lever.co/dnb. Official communication from Dun & Bradstreet will come from an email address ending in @dnb.com. Notice to Applicants: Please be advised that this job posting page is hosted and powered by Lever, a subsidiary of Employ Inc. Your use of this page is subject to Employ's Privacy Notice and Cookie Policy, which governs the processing of visitor data on this platform. Equal Employment Opportunity (EEO): Dun & Bradstreet provides equal employment opportunities to applicants and employees without regard to race, color, religion, creed, sex, age, national origin, citizenship status, disability status, sexual orientation, gender identity or expression, pregnancy, genetic information, protected military and veteran status, ancestry, marital status, medical condition (cancer and genetic characteristics) or any other characteristic protected by law. Know Your Rights: Workplace Discrimination is Illegal - The current poster can be found here. We participate in E-Verify - The current poster can be found here. Accommodations information for applicants with disabilities: Dun & Bradstreet is committed to providing reasonable accommodation to, among others, individuals with disabilities and disabled veterans. If you need an accommodation because of a disability to search and apply for a career opportunity with Dun & Bradstreet, please send an e-mail to AcquisitionT@dnb.com to let us know the nature of your accommodation request and your contact information.