General:
* Archivist: Works with the preservation and organization of historical documents and records.
* Document Examiner: Focuses on the authenticity and origin of documents, often using forensic techniques.
* Manuscript Specialist: Specializes in the study and preservation of handwritten documents, including historical manuscripts.
* Paper Conservator: Works to preserve and restore paper-based artifacts, including documents, maps, and books.
* Antiquarian: A person who deals in or collects antiques, including old documents.
More specific:
* Paleographer: Specializes in the study of ancient handwriting and scripts.
* Codicologist: Specializes in the study and preservation of manuscripts, particularly those bound as books.
* Book Historian: Studies the history of books and printing.
* Papermaker: Experts in the history and craft of papermaking.
* Historical Researcher: Conducts research on historical documents and events.
* Forensic Document Examiner: Uses scientific techniques to analyze documents and determine their authenticity.
The best term to use depends on the specific area of expertise you are referring to.