Fred Abrahamian is Director of Education at UCLA-Olive View, and is a DO. I'm not sure if he's "in charge" of the ED, but he's a very well known academic.
It's the same residency program with different attendings. ER residents rotate both places. Olive View has its own IM program (including some IM fellowships)and psych. Everything else is covered by residents from UCLA. Cedars sent IM residents there, too, back in my day, but I'm not sure about now.