A DBA, or Database Administrator, is a professional responsible for managing and maintaining databases. Their primary tasks include ensuring data integrity, security, and availability. They also perform regular backups, monitor database performance, and implement updates or patches to keep the system running smoothly. In addition to technical skills, a DBA often collaborates with other IT staff and end-users to understand their data needs. They may also design database structures and optimize queries to improve efficiency. Overall, a DBA plays a crucial role in ensuring that an organization's data is organized, accessible, and secure.