The duties of an entry-level editor vary depending on the type of editing they do. As a copy editor, for example, you review the grammar and flow of written copy. As a mechanical editor, you ensure that the writing complies with a particular style, such as AP for news stories. Positions also exist with magazines, publishing houses, and entertainment companies. In these fields, you may work closely with the writer and their story until you publish it. Your responsibilities also include fact checking and source verification.