Kirk McDonald Named Interim Boss of AT&T’s Xandr
The appointment comes after CEO Brian Lesser's surprise exit

Brian Lesser (pictured left) is to be replaced on an interim basis by Xandr's chief business officer Kirk McDonald (pictured right).
Getty Images, Xandr

Kirk McDonald has been installed as interim chief of Xandr following Wednesday’s unexpected exit of CEO Brian Lesser, a move that cut short his two-and-a-half-year reign at the top of AT&T’s ad-tech unit.