A storyteller is a performer who generally writes and then performs aloud the telling of a story. This is often associated with children’s tales. When the performance is mainly for adults the performers are generally called monologists.
A technical writer analyzes and writes about specialized subjects such as computers, engineering, science, medicine and law.
A writing consultant is a sort of editor-for-hire that examines someone’s writing for ways that it can be improved upon.
Glossary of Writing Careers | PoeWar - StumbleUpon