Rethink First
Atlanta, GA
Position Summary The Senior Systems Engineer is a senior hands-on individual contributor responsible for administering, troubleshooting, and improving the reliability and security of enterprise IT systems. The role supports Microsoft 365, Entra ID, Intune, Defender, endpoints, and network infrastructure, and serves as a technical escalation resource for complex issues across these environments. Working with IT, Security, application teams, and external providers, this role delivers system improvements, automates repeatable work, and supports incident response and compliance activities. The position has no direct reports or people-management responsibilities and does not own incident command or service desk management. Key Responsibilities Administer Microsoft 365 services, including Exchange Online, Teams, SharePoint Online, and OneDrive; resolve complex availability, configuration, access, and service integration issues. Maintain Entra ID identities, groups,...