A Hibernate ORM developer utilizes the Hibernate Object-Relational Mapping (ORM) framework to bridge the gap between object-oriented programming and relational databases. They create, maintain, and optimize database systems by mapping Java classes to database tables and Java data types to SQL data types. They write complex SQL queries, procedures, and interfaces, ensuring the efficiency and reliability of data retrieval and storage. They also manage transaction control and database isolation levels, handling exceptions and resolving database access issues. Additionally, they collaborate with other software developers to integrate Hibernate with existing applications, improving data access performance and streamlining development processes.