Just a few comments more broadly about what I hope WMF will look for in an ED:
(1) Realistically, I don't think that we're going to find a single human being who can do everything that the WMF ED should do. With that in mind, I'd like to suggest placing a lot of emphasis on this recommendation that's already on Meta: "Proven track record for building great teams (can properly evaluate people, make good hires)", and expand that to *building great cross-functional teams* and *building great executive teams*.
(2) It's also important that the ED know when to cut losses. That means that they need to have the courage and self-confidence to initiate difficult conversations and make decisions when programs or people are underperforming or are not good fits. Being a good manager often involves being supportive, and it also involves holding programs and people accountable.
I think that I've said enough in this thread, so I'll pause my involvement here for the time being.
Onward and upward (:
Pine