The moves come after a year that saw the Los Angeles office land key clients, including Discover, Moderna, Behr Paint and Schwan’s food brands. Riley has been promoted from president to CEO and Costello from Head of Strategy to Chief Strategy Officer. She takes a title that was not currently held by anyone, as does Costello, but the promotions are validation for the work they have put in to keep the agency on track through the pandemic and beyond.