A Microsoft Defender job typically involves working with Microsoft's security solutions to protect systems, networks, and data from cyber threats. Professionals in this role may focus on threat detection, incident response, vulnerability management, and security policy enforcement. They use Microsoft Defender products, such as Defender for Endpoint and Defender for Office 365, to monitor and mitigate security risks. This role is common in cybersecurity teams within enterprises, managed security service providers (MSSPs), and Microsoft itself. Strong knowledge of cybersecurity principles, threat intelligence, and Microsoft security tools is essential.