An Active Directory Design Developer designs and implements the infrastructure for managing and organizing computers and users within a network. They create the Active Directory (AD) structure, set up services and permissions, and ensure security and scalability. They also establish Group Policies to control networked systems and user settings. Their role includes troubleshooting AD issues, maintaining system health, and ensuring seamless connectivity. They work closely with IT teams to integrate various services and often play a role in migration and upgrade processes. Regular system audits and documentation are also part of their responsibilities to ensure compliance and optimal performance.