digital forensic examiner

I am looking to hire a digital forensic examiner to analyze deleted files and partitions. I am open to suggestions on which software and tools should be used for the examination. I require a medium deadline; the project needs to be completed within 1-2 weeks. My signature on exhibit A has already been determined was added with a program by a out of country forensic examiner. This document was signed in person on paper, not esign. I need someone with valid US credentials to examine the signature. Thank you