editorial staff member; editor
Refers to a person working on the editorial staff of a publication, such as a newspaper or magazine. The term is somewhat formal and less common in everyday conversation than 編集者.
He has worked for many years as an editorial staff member at a newspaper company.
Compound of 編集 (へんしゅう, 'editing') and 子 (し, a suffix for a person engaged in a role). The suffix 子 is used in a limited set of occupational nouns.