Job Description This senior role leads the day-to-day administration and engineering of our Exchange Servers and Exchange Online environment. The ideal candidate pairs strong attention to detail with deep email infrastructure knowledge and advanced PowerShell and Microsoft Graph automation skills. The engineer plays a critical role in designing, implementing, and supporting a reliable, secure, and scalable Microsoft 365 messaging environment with a focus on Exchange Online, ensuring availability, security, compliance, and performance in a hybrid, multi-office law firm environment. The role also serves as a technical lead for Microsoft 365 messaging services, including Microsoft Purview, Mimecast (or similar email security platforms), Microsoft Teams, centralized email signature tools such as Exclaimer, and Microsoft 365 tenant settings that affect mail flow, hygiene, retention, and compliance, in close partnership with Endpoint Management and Identity teams for Intune, Conditional Access, and related identity controls. Targeting $140-160K We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to HR@insightglobal.com.To learn more about how we collect, keep, and process your private information, please review Insight Global's Workforce Privacy Policy: https://insightglobal.com/workforce-privacy-policy/. Skills and Requirements Serve as the technical lead and key owner for the firm’s Exchange Online, Exchange Server, and related Microsoft 365 messaging services, ensuring availability, security, compliance, and performance in a hybrid law firm environment. Help drive the maintenance, design, development, support, and security of the firm’s messaging services, treating email and calendaring as critical business applications. Provide 24x7 support for critical production messaging systems as part of an on-call rotation. Lead or play a key role in migration efforts from Exchange Server Subscription Edition to Exchange Online, and contribute to planning for future tenant-to-tenant Exchange Online/Microsoft 365 migrations to support acquisitions and integrations. Manage and monitor Microsoft 365 tenant components that affect messaging, including mail flow, message hygiene, retention, compliance, DKIM, DMARC, SPF, and Mimecast (or similar products). Collaborate with Endpoint Management and Identity teams on Intune, Conditional Access, MDM/MAM, and identity controls (Entra ID, Active Directory, Okta) to ensure secure, low-friction access to messaging services. Provide advanced administration, technical support, and troubleshooting for complex issues involving Microsoft Exchange Online and Exchange Server in a hybrid environment, acting as a Tier 3 escalation point. Configure and support Microsoft Purview features related to messaging and collaboration, including data loss prevention, retention, and eDiscovery, in partnership with Security and Compliance teams. Design, implement, and maintain automation and reporting for messaging operations using PowerShell and Microsoft Graph to reduce manual work and improve consistency at scale.