I haven't found a similar question, but if there is one, my apologies.
Let's say I need to interview someone for a role which is not in my area of expertise (not even in the same industry), and there's nobody else in the company who knows about that topic well enough. How should I approach the interviewing process?
For example, I'm in a small startup with a few Software Engineers and we need to hire someone to take care of Sales or Marketing. Obviously, our knowledge of those industries is very limited, and definitely not enough to assess if a candidate is good enough from the technical point of view.