أعط أجوبة - English

صوّت الآندون الإجابةسؤال لغوي بمعني (سؤال في اللغه المقصوده)
Collaborator is a correct word?

What is the name of a person who is not part of the staff of a magazine but collaborates time to time doing som piece of news and articles? Callaborator is correct?