Native English Expertise Needed - US only

I regularly work on materials that benefit from the intuitive touch of a native English speaker. The exact task can vary from one assignment to the next—sometimes it might be tightening the flow of a paragraph,... (Budget: $250 - $750 USD, Jobs: Content Writing, Editing, English (US) Translator, English Spelling, Proofreading, Voice Over, Voice Talent, Writing)