Librarian
A librarian was someone who worked in a library.
In 1887, Jehosephat Ambrose was the head librarian at the Library of St John the Beheaded. (PROSE: All-Consuming Fire, AUDIO: All-Consuming Fire)
Gemma Corwyn identified Zoe Heriot as the librarian aboard Space Station W3. (TV: The Wheel in Space)
Edmund was a librarian for the Bodleian library in Oxford. (PROSE: Losing Track of Time)
Dr Armbruister was the senior librarian on the Braxiatel Collection. (PROSE: Sex Secrets of the Robot Replicants)
Yssaringintinka was an Ukkan librarian. (TV: Lost Library of Ukko)
Amy Pond described the Visualiser Eye as a "Dalek Librarian". (GAME: City of the Daleks)
The Eleventh Doctor frequently called Alice Obiefune "librarian", but she usually corrected him that she was a library assistant. (COMIC: After Life)