From 2011 to 2014 he served as professor of History at City University of New York, and since 2014 he has worked at the Yale History faculty where he currently teaches Modern Jewish History.
From 2011 to 2014 he served as Distinguished Professor of History at City University of New York. Since 2014 he has worked at the Yale History faculty where he is currently Lucy G. Moses Professor in the Department of History and Program in Judaic Studies Jewish History.