A professional who coordinates activities of library branch or department, and assists patrons in selection and location of books, audiovisual materials, and other materials. Responsibilities include:

• Trains and directs workers in performance of such tasks as receiving, shelving, and locating materials.
• Examines book reviews, publishers' catalogs, and other information sources to recommend material acquisition.
• Searches catalog files, biographical dictionaries, and indexes, and examines content of reference materials to assist patrons in locating and selecting materials.
• May assemble and arrange materials for display.
• May prepare replies to mail requests for information.
• May be designated according to type of library as Chief Librarian, Branch; or according to department as Chief Librarian, Circulation Department; Chief Librarian, Extension Department; Chief Librarian, General Reference Department; Chief Librarian, Music Department; Chief Librarian, Periodical Reading Room; Chief Librarian, Readers' Advisory Service; Chief Librarian, Work With Blind.