Edit Something 8000 Words

I need someone who can act as both editor and proofreader and is comfortable offering constructive criticism and pulling from his/her vast experience in structure and content. I have a table of contents, preface and Chapter 1 in draft. It's a personal book yet outlines best practices and pitfalls for deploying an Enterprise Corporate Initiative. I need someone who can act as both editor and proofreader and is comfortable offering constructive criticism and pulling from his/her vast experience in structure and content. I have a table of contents, preface and Chapter 1 in draft. Thanks and Native English speakers only please.