Expert English Proofreader Needed ASAP

I’m looking for a sharp-eyed native-level English proofreader to give my document a final polish. Your mission is to correct every grammar and spelling slip, tighten sentence structure, and smooth overall clarity and coherence without altering my voice.

Please return:
• a clean, publication-ready file, and
• a second version with all edits visible (Track Changes or equivalent) so I can follow your logic.

Turnaround time is important to me, so let me know how quickly you can start and when I can expect the finished files.