How Do You Choose US Based Technical Writers?

I need help with a technical document, but I do not know how to choose the right person. I found US based technical writers while searching online. Has anyone worked with writers from the US before? What should I look for before making a decision? I would really appreciate your advice because I want to choose wisely.

I need help writing website content, but there are so many choices that I feel confused. I came across Best SEO Copywriting Service while searching online. Has anyone here tried something similar? What was your experience like, and what should I look for before choosing? I would really appreciate any helpful advice or suggestions from people who have done this before.