J. Muir & Associates, P.A. J. Muir and Associates, P.A. J. Muir & Associates — Miami Business Lawyers J. Muir & Associates, P.A. is a business law firm located in Miami, assisting business owners and entrepreneurs with contracts, general legal advice, and commercial litigation, to resolve legal disputes as quickly, efficiently, and successfully as possible. When you own a business, it is critical to have an experienced business attorney on your side. Whether you are facing a lawsuit or legal dispute, or planning ahead, it is important to have a solid legal foundation that will minimize your risk of lawsuits and litigation, and put you in the best situation possible if you do have a problem.