Help with floor plan

My project is to help me with a floor plan. I need someone to modify an existing floor plan that I already have; a rough sketch. The floor plan will include 1-3 rooms in the design. I am looking for someone who is experienced in modifying floor plans, and who has a good eye for detail. The person should be able to take my existing floor plan and help me modify it in order to create the desired result. I am looking for a professional who is detail-oriented and has knowledge of interior design and floor plans.