Looking for a proofreader having editing knowledge and who can change write up by modifying the scripts

I am looking for an experienced proofreader who has a background in editing and can help me modify my written content. Specifically, I need someone to proofread business documents that have a length of 500-2000 words within a specified timeframe. The freelancer should be well-versed in English grammar and understand the nuances of the English language. I am expecting them to amend any mistakes, errors, and typos in the content and suggest changes/improvements if required. In addition, I would also like the freelancer to check that the sentences used match the tone of the content and make sure that the language is lucid and easy to understand. The proofreader needs to ensure that all corrections are done accurately and efficiently with great attention to detail. If you have the required qualifications and the necessary skills, then I would love to hear from you.