Professional Article Tone Enhancement

I have an existing article that needs a thorough style overhaul. The core content is solid, but right now the language feels uneven. I want every paragraph refined so it reads with a formal, professional cadence and carries an informative, authoritative voice from start to finish... (Budget: $30 - $250 USD, Jobs: Article Writing, Content Development, Content Writing, Copy Editing, Copywriting, Editing, Proofreading, Technical Writing)