I would actually posit that survivors exist most commonly in Linn's Manager framework (although I do have issues with some of his modeling...it's over-simplistic in some cases although it does serve to get the point across), although Guardians could be considered survivors by definition as they tend to be most resistant to change. They do exist in every area of human endeavor as Ken points out, although they do tend to congregate in certain careers and occupations. They are also dangerous because they tend to linger on (and on, and on) in most organizations because they are careful to position themselves so that they accrue little to no blame for anything and can leap in to snag credit (or try to) and every opportunity.