Digital marketing firm iCrossing reported Monday that Don Scales, the company's president and former chief operating officer, has accepted the additional responsibility of chief executive officer. As such, iCrossing noted, Scales will be responsible for the company's worldwide operations. The Scottsdale, Ariz.-based business said Jeffrey Herzog, the company's founder and former CEO, will continue to provide strategic input as vice chairman of the board of directors. Scales joined iCrossing in March 2006. He was previously the CEO at Agency.com.