Well, even if the author does provide a definition elsewhere, I think the problem is in part that advice is only applicable for organizations that agree with th

Well, even if the author does provide a definition elsewhere, I think the problem is in part that advice is only applicable for organizations that agree with that definition. I think the actual implications of a "staff" or "principal" job title vary meaningfully between organizations, and worse can shift when there's a shakeup of senior leadership.