Co-writer for Psychological Thriller Transformation

I have a completed 35,000-word psychological thriller. One that takes us inside the mind of an Aspy protagonist. It’s both tense, suspenseful and quirky. I'm looking for a co-writer to help me strengthen the mystery, clarify the plot, improve pacing, eliminate plot holes, and develop a more satisfying ending. I want to preserve my voice. I’m looking to finish it as a book and then make it into a screenplay. Additionally, I am a psychologist and on the spectrum. I want to keep and add to the unique savant qualities the main character has as he helps the FBI and FAA solve this murder mystery airline disaster that he is the only survivor of.