What is Archivist?

Legal Definition
An archivist (AR-kiv-ist) is an information professional who assesses, collects, organizes, preserves, maintains control over, and provides access to records and archives determined to have long-term value. The records maintained by an archivist can consist of a variety of forms, including letters, diaries, logs, various other writings, official documents, sound and/or picture recordings, etc.
-- Wikipedia
Legal Definition
One to whose care the archives have been confided.
-- Bouviers Law Dictionary
Legal Definition
The custodian of archives.
-- Black's Law Dictionary