librarian

noun3

1. •
   The keeper, manager of a library.

   • The amenities of the institute include a well-arranged open-access library of 18,000 volumes, and a small but valuable reference library of railway literature; the present writer is Librarian. — 1944
2. •
   One who cares for the publications, files etc. in a library, whether staff or volunteer.
3. •
   A person who processes and organizes information.