The man to runs the joint where I work likes to be called "professor" as opposed to "the Archivist" or Dr. Such N. Such. "The Professor" sounds like a comic book character, like Professor Xavier of the X-Men.
So say we had a agency of superheroes within the agency. So up top we have The Professor, who can only appoint powers. Then we have the Librarian who can access any published material in English with just his mind. The the Conservator, who has nifty weapons like the spatula of DEATH, and glues, and tape and mylar. The Conservator can trap bad-guys in mylar so tough that they can escape. The Electronic Archivist who is like the Librarian but can access any thing that is in any computer, despite firewalls, that is linked up somehow, with his mind. The Intern who can copy anything, documents, voices, appearances at will. And lastly, the Records Manager who can walk into any building and and immediately has knowledge of every record, electronic, A/V or textual in said building right down to every single Post-it Note.
Over at the Library of Congress the other Librarian (there would be several in this universe) has a whole team of minor librarians with superpowers as well as the Poet, who has the power of suggestion. The Musicologist, who can do fancy things with notes and can play ever know musical instrument. And the Cataloger who can put anything in oder, not so much a superpower but rather OCD on steroids.
The superheroes go out and fight waste and corruption in he government until their operation is cut down by their arch nemeses, the President of the United States. The Conservator goes rogue and becomes a murderess for hire and the Records Manager becomes a corporate spy. The Cataloger goes insane and is locked away, forever.