Budget and time frame are two very concrete things to negotiate when looking for an editor. You know when you need the manuscript back and how much you can afford. But how do you figure out if your editor is suited to you? Do you need to take a Meyers-Briggs test and compare astrological charts? No, thank god.
Make sure your editor enjoys or has experience in the genre in which you are writing. I’ve had people tell me my memoir should be a novel (I don’t write novels) and my fiction-writing spouse has had people tell him short stories should be essays (he does not write essays). You want an editor who will meet you where you are and who will be enthusiastic and knowledgeable about your genre of choice.
Does your editor respond to your emails in a time frame that works for you? Do you want to talk to the editor on the phone or by video call? Does your editor do that? Does the way they talk about their work make sense to you?
An editor is going to give you criticism, probably a lot of it. What do you need when you receive feedback? Do you want the unvarnished truth? Or do you prefer your criticism presented in a gentler approach? Do you need a lot of encouragement or reassurance?
None of these styles are right or wrong, unless you are an experienced writer and your editor explains each change she makes in excruciating detail. That is a waste of time for both of you.
Not sure what kind of writer you are? How do you respond to criticism or feedback at your job? How do you give criticism or feedback to other people?
How do you know if an editor is right for you?