I haven't read Developer Hegemony, but the book Managing the Professional Services Firm by David Maister is all about the structures present in other profession

I haven't read Developer Hegemony, but the book Managing the Professional Services Firm by David Maister is all about the structures present in other professional services work, e.g. law, accounting, engineering, etc., even car mechanics! :-) A ton of it is shared with software, so if you are a freelancer or trying to start a dev shop, it is great reading.