Spoilers aside, it just seems glaring that Bertram wouldn't set off huge red flags with Jane's therapist friend.Also, he doesn't show any sociopathy or anything that would make him seem to be an enthusiastic/charismatic figure folks would want to follow.
Most importantly (like Kirkland) the positionBertram is in is one in which your career and background for the past 20 or 30 years would be well known and well listed and easy to research. Haffners potential link to the RJ Farm years ago seems to be fitting in the context of "don't look too close." Maybe that's the achem's razor (sorry for spelling).
After changing my mind several times, Haffner now makes the most sense to me.