Roof Loading for commercial building

I am seeking an experienced structural engineer to conduct a roof loading analysis for a medium-sized commercial building (10,000 - 50,000 square feet). The main purpose of the analysis is to assess the ability of the roof to accommodate new equipment with a weight of more than 2000 lbs. The analysis should determine if the roof has the capacity to safely support the loading of the added equipment. The engineer should provide detailed recommendations for any structural modifications necessary to safely and securely add the equipment. I expect the engineer to utilize a combination of structural engineering principles, codes, and standards, as well as develop methods that allow for the appropriate evaluation of my structure. I am looking for a professional who will provide me with reliable recommendations in an accurate and timely manner.