ok.. so Everyone knows about regina dugan…
what about the other two?
Ok then, so here's another(maybe):
Frank Dellaert
In an August 2016 post announcing his decision to join Building 8, Frank Dellaert signaled that his Building 8 project would be over by the summer of 2018, when he planned to return and teach at Georgia Tech.
"I can't yet discuss the details of what I'll be working on at Building 8, so stay tuned," he wrote. "Suffice it to say, I accepted this position because of the potential impact. I'm eager to apply DARPA-style development to building hardware products at Facebook - audacious science and product development in one place? Let's do it."
sauce: https://www.businessinsider.com/facebooks-building-8-working-on-camera-augmented-reality-mind-reading-projects-2017-3