Agencies | People Cossette Prez Splits for Chief Exec Role at Publicis Dallas By Kiran Aditham on Jan. 4, 2011 - 2:46 PM After three-and-a-half years as president of Cossette New York, Sally Kennedy is heading to Texas to take on the CEO post at Publicis Dallas. During her tenure at Cossette, Kennedy oversaw all operations, including office manageme ...