Writing a full description and making a doable plan for a school management system

I need an expert of coding markets to write a complete description to design a school management system. All operations and designs must be very clear so coders can perform the descriptions. The person who will do the job should have experience in similar jobs before. I will discuss with him the main ideas and he will perform the description and send it to me in word document with designs for front design and all operations and department.