Office 365 engineer

About the Role Our Corporate IT team is seeking an experienced Office 365 Engineer, with a strong emphasis on Exchange, Teams and Active Directory (AD)/identity management. Key Responsibilities Lead the design, configuration, and ongoing administration of Exchange Online within the Microsoft 365 tenant, including mailbox provisioning, shared/resource mailboxes, distribution groups, and Tenant to Tenant migration projects. Architect and manage end-to-end mail flow including send/receive connectors, transport rules, smart host relay, third-party gateway integrations (e.g., Mimecast, Proofpoint), and DNS records (MX, SPF, DKIM, DMARC).

Serve as the primary owner of Exchange Online Protection (EOP) and Microsoft Defender for Office 365, configuring and tuning anti-phishing, anti-spam, safe links, safe attachments, and protection policies. Act as the Tier 3/4 escalation point for all email-related incidents including NDRs, mail flow failures, spoofing, BEC attacks, and malware delivery events, with full Root Cause Analysis (RCA) documentation. Design, deploy, and maintain Microsoft 365 DLP policies across Exchange Online, Teams, SharePoint, and OneDrive in alignment with GDPR and HIPAA requirements, tuning conditions and exceptions to minimize false positives.

Administer Microsoft Purview compliance solutions including retention policies, sensitivity labels, MRM, litigation holds, eDiscovery (Content Search and Premium), communication compliance, and insider risk management policies. Manage email authentication posture by continuously validating and enforcing SPF, DKIM, and DMARC configurations, reviewing Microsoft Secure Score recommendations. Develop and maintain PowerShell automation scripts for Exchange Online bulk operations, user lifecycle workflows (onboarding/offboarding), compliance reporting, and Microsoft Graph API integrations with ITSM or HRIS platforms.

Follow ITIL and change management best practices for all platform changes — including raising RFCs, participating in Change Advisory Board (CAB) reviews, maintaining incident/problem records, and producing post‑implementation reviews (PIR) for major changes impacting Exchange, Teams, or voice environments. Administer Microsoft Teams — managing messaging, meeting, and app permission policies, Teams Rooms (MTR) devices, and providing Tier 2/3 escalation support for Teams incidents. Administer Entra ID — identity management using Azure AD Connect and SSO technologies like SAML.

Knowledge of Windows and Active Directory, TCP/IP, DHCP, DNS, etc. (Nice to Have) Administer RingCentral user provisioning and IVR. Preferred Qualifications Experience with large‑scale Exchange migrations and tenant consolidations. Microsoft certifications (Exchange, Teams, Microsoft 365, or Azure).

Salary range: 80k-90k Harris is committed to an equal opportunity employment program, and applications from members of targeted groups, including women, persons with disabilities, Indigenous peoples, and visible minorities, are encouraged. If you are a person with a disability, you may receive assistance with the screening and selection process upon request. #J-18808-Ljbffr